PLANT SCIENCE BULLETIN
A Publication of the Botanical Society of America, Inc.
June 1973 Vol. 19 No. 2
Women in Botany Beryl Simpson 22
The Audio-Tutorial Mistake Revisited Elwood B. Ehrle 24
Planned Obsolescence? Opinion/Commentary Rudolf Schmid 25
Mycological Nomenclature 26
Scientists from more than 20 Countries speak at Mexico City Meeting 26
Man's Need for Green 26
Botanical Potpourri 27
Clement. Gray. Bowers, '1893-1973'
Book Reviews . . . 28
Tree Structure and Function, Martin Zimmerman and Claud L. Brown
Phyloehenlical Ecology, J. B. Harborne (ed.)
Photosynthesis, Photorespiration, and Plant Productivity, Israel Zelitch
Ecology of Soil Fungi, D. M. Griffin
Methods of Enzymology, Volume -XXIII Photosynthesis, Part A. . Anthony San Pietro (ed.)
Physiology and Biochemistry of Tobacco Plants, T. C. Tso
The Agave Family in Sonora, H. S. Gentry
The Diagnosis of Plant Diseases, R. B. Streets
The Biology and and Chemistry of the Umbelliferae
Women in Botany
Department of Botany
Washington, D. C.
I am woman. Hear me roar
in numbers too big to ignore.
and I know too mach to go back to pretending.
'Cause I'ue heard it all before
and I've been down there on the floor,
no one's ever gonna keep me down again.(1)
I agree. No one can ignore the cry of women all over the country for equal
opportunity to that of men in pursuing a career, and equal compensation and
respect once they begin to practice it. Nor can anyone ignore the past discrimination
against women in numerous professional and social situations. Articles listing
examples of discrimination against women scientists and reporting court actions
by women's groups have appeared in almost every general scientific journal.
Soul searching articles on the role of the modern woman in society and the
home currently constitute a major part of women's magazines. Here, instead
of presenting another of these articles, I would simply like to give an idea
about the present position of women in botany, show how it corresponds, in
general, to the pattern of women in most professions, and, finally, give a
few personal opinions.
Obtaining data on women in specialized fields is, at the present time, impossible.
Although the AIBS is preparing a study of the distributions of people in various
scientific "subfields", it is not yet complete. Consequently, in order to
get some idea of the numbers of women in botany and something of their activities,
I have used the Yearbook of the Botanical Society of America, 1971-1972. I
am sure that by using only one source, I have left out many women and probably
also included some peripheral individuals. However, the Botanical Society
of America is larger and covers a broader range of interests than any, other
botanical organization. It produces a journal technical enough presumably
to appeal to only those people with a professional interest in botany.
Table 1 presents the results of the tabulation of the members in the Yearbook.
The only basis for judging whether an individual was a woman was the name.
In some cases it was difficult to tell whether the name applied to a man or
a woman, but the mistakes in either direction hopefully cancelled each other
out. Several figures in this table should be particularly noted. For example,
19% of the current non-student membership are women and 19% of the
student members are women. Second, 13% of the women have joint memberships.
Forty-one percent of the women members listed a professional title compared
to 64% of the men. Either 59% of the women did not complete their
degrees or feel that using a title is in poor taste. Likewise, only 56%
of' the women listed a professional address whereas 91% of the men gave
a business address. Although I am speculating, I think this figure means that
those women who have their journals sent to their homes have no office or
laboratory permanent enough, or with which they identify enough to receive
mail. Even if one reads her journals at home (as I do), she knows that lists
such as the Year-book are used by members of the scientific community to locate
colleagues. Finally, it is noteworthy that :3% of the women members are
Let us now compare these figures with those of professional women in general.
The first,- and encouraging, datum, is that the percentage of women with a
professional interest in botany is higher than the average of doctorates granted
in the natural sciences as a whole (19% is. 5.6% , or 7% vs. 5.6%
if only the women with professional titles are considered, (2) ). Apparently,
botany is a preferred area of the natural sciences for women. Margaret Mead,
in her autobiography "Black-berry Winter" (3, p. 57) stated that when she
tried to make clear to her grandmother (a mid-nineteenth century college graduate
who had a major influence in her life) what she was doing, her grandmother
was not pleased with her choice of careers — she thought that botany
would have been better than savages. Perhaps this sentiment reflects that
somehow botany seems more "feminine" than other sciences. These figures may
be misleading. however. Packard (4, p. 99) stated that 25% of the mathematicians
and biological scientists were women. If this is true, women would be underrepresented
in botany compared to some other fields.
The large number of women with joint memberships corresponds to Austin's)
2) findings that women doctorates tend to marry men of comparable education
and often men in closely related fields. Yet, her findings also showed that
if a woman were married to a man in the same field, she was more likely to
be unemployed than if she were married to a man in a different field. Unfortunately,
because the addresses given in the cases of joint memberships are usually
those of the husband, it is difficult to tell if these women are working.
The figures also indicate that there has not been a recent increase in the
proportion of women entering botany. Lack of increase in the numbers of women
students relative to men students agrees with the Bureau of Labor Statistics'
figures which show that there has not been a rise in the percentage of college
professors and instructors (the areas where most students in botany would
probably seek jobs) since 1910. Actually, the percentage dropped after the
1930's. The decrease in women entering professions in the forties through
the sixties is a general phenomenon. Vance Packard (4) mentioned this trend
and Kate Millett (5) propounded a theory that there was a subconscious attempt
to undermine the wave of women's liberation of the 1920's. A more realistic
approach would combine a reaction to the era of the flapper and the sobering
influence of World War II. Although there is no data on the ages of the botanists
in the Yearbook, it subjectively seems to me that there is a bimodality in
the ages of women botanists, with few women botanists who would have received
degrees during the period of 1940-1960. Many noted women botanists began their
careers in the 20's and :30's, but few after World War II. It should be noted
that 8.9% of the women members are retired compared to 5.7% of the
Finally, the high percentage of nuns in botany de-serves some mention. Austin
(2) listed characteristics of
CHARACTERISTICS OF THE MEMBERS OF THE BOTANICAL SOCIETY 1W AMERICA *
Member of the
(Dr. or Prof.)
Business address listed
Nun or Priest
("Sister" or "Father")
women doctorates which were associated with discrimination in employment.
Such characteristics included job mobility, husband's job, number of publications,
children, etc. Only one characteristic, being a nun, showed a negative correlation
with discrimination. Moreover, this factor showed a stronger correlation than
any of the other characteristics. Several reasons probably lie behind this
strong correlation. Nuns are encouraged to follow a profession, they are ensured
a position, and they are not affected by many of the factors other women associated
with discrimination such as children, job mobility, etc.
This last comparison brings me to the opinion part of this commentary. I
think the figures show that women have been, and are, professionally interested
in botany. In order to make the most of this interest, discrimination in training,
hiring, and compensation must be eliminated. However, simply increasing the
hiring and salaries of women will not drastically alter the present situation
although it will certainly help. What is equally needed is a conscious effort
to convince women that they can and should follow professional careers. Matina
Horner (current President of Radcliffe College) conducted a study at Michigan
entitled "Femininity and Successful Achievements: a Basic Inconsistency" which
showed that the women she tested equated professional success with a loss
of femininity — a loss which they were unwilling to incur. Most women
who pursued careers felt that they had to make a compromise between losing
their femininity and success, that they had to disguise their ability and
that they must go to great lengths to avoid competition. Horner concluded
that even if discrimination barriers were removed, fear of success would still
deter most women.
This hesitancy of women does not mean that we can shrug our shoulders and
say that women will not take ad-vantage of equal opportunities if they are
offered; rather it means that we must also help to produce a needed sociological
change. Despite the fact that about 50% of the currently contracted marriages
will end in divorce (4) women are still made to feel that having and running
a family are the most important things in a woman's life.
Since marriage can no longer be assumed to be one's lifelong occupation,
women should be prepared to find a career early in life. Yet, women will and
should continue to want marriage and a family. Ultimately, whether a woman
continues a career or not will depend on the individuals in a marriage as
well as the realization by employers that they need to encourage and help
women with families. Harvard and Princeton have already modified regulations
so as to ease the pressure on women with young children. However, their home
environments must be equally liberal. No matter how much professional opportunity
is present, if a woman feels guilty, tense, or simply physically exhausted
because of not being quite able to manage all the things a woman has been
conditioned to feel she must do, plus maintaining her career. she will probably
finally abandon one of the parts of her life. Usually it is the professional
part which suffers.
I can conclude only by saying that at the present time. the patterns and
characteristics of' women in botany seem to be similar to those of professional
women in general. To increase the percentages of women in the professions
will require several things: the removal of the obvious hinderances of discrimination;
a conscious effort to convince women that they are capable of pursuing a career
without loosing the qualities of' being a woman, and a generation during which
we will hopefully dispose of our current conditioning of men and women. The
next few years will be a transition period, but I have no doubt that the change
will occur- The increase in interested individuals and new ideas that this
change will cause could not help but advance a profession.
I am woman. Copyright 1971, 1972 by Buggerlugs Music. Sung by Helen Reddy.
Austin, H. S. The woman doctorate in America. Russell Sage Foundation,
Hartford, Conn. (1969) 169 pp.
* Data compiled from the Yearbook of the Botanical Society of America, Inc.
1971-1972 . Miscellaneous Series. Publication 149. 144 pp. Percentages are calculated,
except for the first two items, and the row for joint memberships, and nuns
on the numbers of women or men excluding the joint memberships.
Mead, M. Blackberry winter. My earlier years. William Morrow Co., N.Y.
(1972) 351 pp.
Packard, V. The sexual wilderness. Pocket Book edition. New York. (1970)
Millett, K. Sexual politics. Sphere Books edition. Lon-don. (1971) 393
I thank S. Yankowski for help in preparing Table 1 and L. Eyde for suggesting
The Audio-Tutorial Mistake Revisited
Elwood B. Ehrle
Dean, School of Arts and Science
Mankato State College, Mankato, Mn.
In the January 15, 1970, issue of BioScience a short article appeared over
my name entitled "Avoiding the Audio-Tutorial Mistake." By that time I was
in the middle of my 3-year tenure with AIBS. I was traveling extensively in
behalf of biological education, visiting many campuses across the country,
observing a wide variety of A-T programs in operation, and becoming increasingly
concerned about what I saw.
There were a number of fine AT programs in operation in 1970 as, I am sure,
there are now. What concerned me in 1970 was the feeling that some people
plunged into it prematurely and seemed to view it as a magic wand solving
all manner of instructional ills.
As I put it in 1970:
It seems that every time an exciting new advance is made on the educational
scene, a whole series of misuses follow in rapid order. One such advance was
the introduction of the audio-tutorial method, the misuses of which might
be dubbed "The Audio-Tutorial Mistake." Please understand that it is not A'I'
that is being criticized here, but rather misuses of A-T. Similarly, one could
speak of the BSCS mistake, the film-loop mistake, and several others. The
problem is generic. It has its roots in seeking appal apparently simple solutions
to very complex problems in response to the generally desirable recognition
that "we've got to du something" to improve our courses.
The A']' mistake accrues from an invalid theorem: namely, that A-T solves
all educational problems. There are at least two important corollaries not
generally recognized by many practitioners in the field. Simply stated, these
are: (l t A poorly conceived course taught by the A-T method is still a poorly
conceived course. (2) A had lecture put on tape is still just a had lecture.
The hope that a given arrangement of hardware is going to produce ipso loch)
better teaching-learning situations is, alas, a false hope. The hope that
getting one's stuff onto recording tape and movie film somehow improves it
does not resolve the A-T mistake.
There seemed to be little awareness of the rapidly growing literature on
A-T instruction, little attention to the development of simple, clear statements
of the objectives faculty were hoping to encourage students to reach, and
little operational reality to the strategically important principle that above
all else A-T, when well conceived, frees the teacher for one-to-one teaching.
What I saw on a number of campuses suggested that the old courses, some good,
some not so good, were still unexamined as far as their philosophy and objectives
were concerned, that these courses had been put into an A-T format with less
than sufficient attention to the technological demands of that system of instruction.
and worst of all that A-T was being used as the teacher rather than as a device
to free the teacher. Hence my clubbing the result, the Audio-Tutorial Mistake.
I have been brooding over that brief article ever since it appeared. It occurs
to me now that the A-T mistake may run deeper than I had previously thought.
The mistake may be not only in the magic wand thinking which asserts that
a particular technique converts inappropriate content into appropriate, but
also in the conviction that any particular set of content is best for any
given student coming down the track. If A-T allows flexibility only in pacing
and emphasis it probably isn't worth the tremendous investment of time, money,
and expertise required to make it go.
The real advantage of A-T may not lie in its self-pacing dimensions but rather
in the fact that it makes it feasible for every student to select a different
pathway through the subject matter or indeed, a different set of subject matter.
The missing piece in 1970 may have been the development of numerous semi-autonomous
modules or mini-courses presented in the A-T mode. The modularization of instruction
was in its infancy. It still is. In 1971, CUEBS published (Pub]. 31) its valuable
book on "The Use of Modules in College Biology Teaching." It then became apparent
that modularization required a multi-mediated instructional technique.
Imagine, if you will, a modularized A-T course in which a student is guided
and self-selects his own path-way through the subject matter. If he is interested
in population problems he pursued modules 1, 2, 7, 8, 12, etc. If he is interested
in environmental problems he uses 1, 3, 6, 9, 1I, etc. If he is concerned
about racial problems the sequence might be 1, 4, 5, 7, 13, etc. To learn
about evolution he might be led to pursue a different set of modules. The
point is that a modularized A-T program makes it possible for him to choose
among a variety of options each of which will ensure that he is learning good
solid biology. With Cassette tapes and players a whole module can be set up
in it shoe box. There can be pre-tests, tapes, directions for experiments,
guidelines for investigations, reading lists, Kodachrome or microscope slide
sets, film loops—the whole works in a shoe box to be selected or ignored
according to each student's interest.
It may be unfair to pin the label A-T Mistake on one track teaching-learning.
The mistake is a lot older than A-T. Many who have proceeded via a lecture-discussionlaboratory
technique have presented only one track for a student to follow for awhile
and abandon evermore. For many years this may have been necessary. Alternative
ways of teaching had not yet been invented. Now with the advent of A-T and
modularization it is possible, perhaps for the first time, to get off the
single track, present a variety of options and really engage the student where
his interests are.
To use A-T or modularization toward some other end would, in my opinion,
be a mistake. That this mistake is being made, I am sure. I am equally sure
that it can be overcome. As of old, it will take good teachers to make the
difference. To those already into A-T modularization, I wish God's speed.
To those who are onto one or the other, I invite consideration of an instructional
strategy combining the best features of both. To those not vet into a re-
examination of the content, intent, and modus operandi of biological education,
I extend an invitation. It's an ex-citing and intellectually demanding pursuit
requiring the finest minds and highest commitment we, as biologists, can muster.
Ourselves, our colleagues, and our students will be the better for it. We
can all learn from the mistakes of the past and as A-T modularization becomes
more common, hopefully, we can avoid building these past mistakes into our
It is an old adage that textbooks are out-of-date the moment they are published.
One thus looks forward to new editions of texts, especially those that had
won some degree of acclaim, in the hope that a good product has been made
even better. It is obviously difficult to state with precision when a new
edition is warranted. In some of the rapidly expanding fields where the functional
half-life of knowledge has been estimated to be five years or less, frequent
new editions are clearly desirable. However, in most fields, including those
loosely labelled "classical", the expansion of knowledge is more arithmetic
than geometric. In these areas, therefore, one greets with some scepticism
the appearance of a new edition only one, two, or even four or five years
after a previous edition. One sadly suspects that the concept of planned obsolescence,
so widespread in such consumer goods as automobiles and fashions, has finally
also gained considerable application in book publishing.
Planned obsolescence in book publishing takes two main forms: (1) semi-new
editions, where an old edition is only slightly revised, and (2) pseudo-new
editions, where an old edition masquerades as a new one by means of simpie
deception, for example, a new cover and/or dust jacket, or the more insidious
practice of putting the date of a new printing on the title page and hiding
the actual date of copyright on the verso of the title page.
PLANT SCIENCE BULLETIN
ROBERT W. LONG, Editor
Life Science Bldg. 174
University of South Florida
Tampa, Florida 33620
Elwood B. Ehrle, Mankato State College
Adolph Hecht, Washington State University
Donald R. Kaplan, University of California (Berkeley)
Erich Steiner, University of Michigan
Beryl Simpson, Smithsonian Institutuin
June 1973 Volume Nineteen Number
Changes of Address: Notify the Treasurer of the Botanical Society
of America, Inc., Dr. C. Ritchie Bell, Department of Botany, University of North
Carolina, Chapel Hill, North Carolina, 26514.
Subscriptions for libraries and persons not members of the Botanical
Society of America are obtainable at the rate of $4.00 a year. Send orders with
checks payable to "Botanical Society of America, Inc." to the Treasurer.
Material submitted for publication should be type-written double-spaced,
and sent in duplicate to the Editor. Copy should follow the style of recent
issues of the Bulletin.
Microfilms of Plant Science Bulletin are available from University
Microfilms, 300 North Zeeb Road, Ann Arbor, Michigan 48106.
The Plant Science Bulletin is published quarterly at the University of South
Florida, 4202 Fowler Ave., Tampa, Fla. 33620. Second class postage paid at Tampa,
All new editions obviously are not examples of planned obsolescence. Nevertheless,
this does seem to be increasingly the vogue today, although the problem no
doubt has existed to some extent since the time of Gutenberg. The recent new
(second) editions of the textbooks by Faegri and van der Pijl' on pollination
ecology and by van der Pijl' on dispersal ecology illustrate this trend, although
the following could be cited as even more flagrant examples of planned obsolescence
(edition dates indicated in parentheses): Bell and Woodcock's The Diversity
of Green Plants (1968, 1971); Parihar's An Introduction to Embryophyta, Vol.
1, Bryophyta (1956, 1957, 1959, 1962, 1965), and Vol. 2, Pteridophytes (1955,
1957, 1959, 1962, 1965); and Sporne's The Morphology of Pteridophytes (1962,
Since the two companion volumes on reproductive ecology under consideration
here are well-known and have met with general acclaim, I shall restrict my
remarks to the changes involved in the second editions of these books. Neither
book, alas, represents an extensive revision. Although the type was completely
reset in the new editions, many portions are identical to those of the old.
Additions and revisions are mostly minor and consist mainly of adding or rearranging
words, phrases, or sometimes sentences in paragraphs borrowed from the first
editions, or occasionally even of intercalating a new paragraph or two. The
new editions contain not only the same chapters and major sections as did
their respective earlier editions but also essentially the same figures and
tables (two additional figures in the new pollination book; one additional
table, giving the syndrome of chiropterochory, in the new dispersal work).
On first appearance the new edition of the pollination book seems quite different
from its 1966 edition: The second edition is fatter, with some 46 extra pages,
and it has a more colorful dust jacket, with two dynamic (though quite grainy)
photographs of pollinating bees. The apparent expansion of edition two, however,
is a fa, ade since edition one not only has smaller type but also some 19%
more printed matter per page (113 x 190 mm of text vs. 110 x 164 mm in edition
two). The long chapter on pollination in the flowering plants received the
most revision. Other chapters, including the pedagogically very valuable one
giving 49 case histories illustrating pollination types, are nearly identical
in both editions. A page on "Other substances as attractants" and the case
histories of Pedicularis groenlandica and P. lanceolate represent the only
completely new sections. The eight-page section on orchids was logically deleted
in view of van der Pijl and Dodson's excellent Orchid Flowers: Their Pollination
and Evolution (1966). Most of the diagrams are reduced in size in the second
edition, some up to 50% compared to the earlier edition, In many cases
the diagrams suffered a concomitant loss of clarity, a condition aggravated,
in my copy at least, by too heavy inking of the plates. The table of contents
of the second edition was expanded by listing all the sections and subsections,
which unfortunately continue to be confusingly coded as
1' I Faegri, K., and L. van der Pijl. The Pr'wctples of Pollination Ecology.
2nd Edition. Perganum Press, Oxford, New Fork, etc_ 1971. xii, 291 pp., illus.
$14.00. [1st edition 1966.j
I') van der L. Principles of Dispersal in Higher Plants. 2nd Edition. Springer-Veriag,
New Turk, Heidelberg, l3erlia. 1972. xi, slit, I 1] pp., illus. $12.60. 11st
in the first edition (e.g., section "126.96.36.199.4" on ants us. "188.8.131.52.2" on
On initial appearance the new edition of van der Pijl's slim tome on dispersal
ecology seems very similar to the 1969 edition, and it is—a conclusion
reinforced by the nearly identical dust jackets, binding, size, and layout
of the two editions. The new edition is only twelve pages longer, but since
eight pages result from expanded preliminaries, bibliography, and indices,
the additional text is only four pages. The net addition in text in edition
two, however, is actually about eight pages 'since each page contains an extra
line of print as well as lines that are 7 mm wider as compared to edition
one. The section on "Island Floras", with seven entirely new (but short) paragraphs
out of a total of twenty, is the most drastically revised part of the book.
Considerable editing has largely eliminated the numerous grammatical and stylistic
ambiguities that plagued the first edition and made it especially difficult
to read. The editing, however, has not otherwise appreciably altered the author's
very distinctive style, which is anything but Hemingwayian!
The semi-new editions of these excellent works are in-deed improved products,
and anyone lacking a copy of either the pollination or dispersal book will
naturally want the superior second edition, despite the exorbitant price.
Both works, however, contain such distressingly little new factual information
that one wonders whether new editions were really warranted. At least the
dispersal book was considerably upgraded from a grammatical and stylistic
viewpoint, but one laments that this had to be done after the first edition
and not before. Since the new editions of both works are only slightly better
than the earlier models, and since publishers do not accept trade-ins toward
new models, many persons and institutions on limited budgets will find their
old models of these books sufficiently functional to justify postponing purchase
of the new model until the inevitable newer model appears a few years hence.
Since publishers increasingly are resorting to planned obsolescence to capitalize
on sales to a captive audience of libraries and students, it seems prospective
publishers of new editions of textbooks must now pay heed to one of the time-honored
watchwords of the marketplace: caveat emptorj
Department of Botany
University of California, Berkeley
Mycologists and lichenologists should note that a standing Nomenclature Committee
has been established by the International Mycological Association to study
specific problems in the application of the Code of Nomenclature to fungi
(including lichen-forming species), and to propose changes in the Code at
the 1975 Botanical Congress. Actively interested persons are encouraged to
serve on one or more Special Committees, each devoted to study of a specific
problem. Five areas of concern have already been identified at the First International
Mycological Congress in Exeter in 1971; these Special Committees are being
organized now, and mycologists willing to serve on these Committees should
notify the Nomenclature Secretariat as soon as possible so that they may be
appointed as members:
(1) Revision of Art. 59 on pleomorphic fungi; (2) Designation of living materials
as types in fungi; (3)
Registry of new names and of proposals for conservation; (4) Unification
of starting-point dates and problems of overlap of groups with different starting
dates; (5) Provision for handling infraspecific taxa not now covered by the
Code. Other problems that deserve study should be brought to the attention
of the Secretariat, which may then establish additional Committees to study
Mycologists may correspond with any member of the Secretariat for further
information, or to contribute opinions on any problems of nomenclature. Those
desiring to propose their names for membership on Special Committees should
notify the Chairman of the Secretariat.
LĪV%A, Nomenclature Committee Secretariat:
R. P. Korf (Chairman), Plant Pathology Herbarium, Cornell University, Ithaca,
N.Y. 14850, USA
D. L. Hau,ksworth, Commonwealth Mycological Institute,
Ferry Lane, Kew, Surrey TW9 :3AF, England
G. L. Hennebert, Lab. Mycologie Syst. et Appl., U.C.L.,
Pare d'Arenberg, B-:3030 Heverlee, Belgium
Z. Pouzar, Botanical Institute, Academy of Sciences, 252 43 Pruhonice near
D. P. Rogers, Department of Botany, University of Illinois, Urbana, Illinois
L. K. Weresub, Plant Research Institute, Central Experimental Farm, Ottawa,
Scientists from more than
20 countries to speak
at Mexico City meeting
In the belief that science is of overriding importance in the world today,
and that, being universal, it transcends national boundaries, the American
Association for the Advancement of Science (AAAS) and the Consejo National
de Ciencia y Tecnologia (CONACYT) of Mexico have undertaken jointly to sponsor
an inter-American scientific meeting thought to be the first of its kind.
During a two-week period (20 June-4 July 1973) in Mexico City, upwards of
5,000 scientists, engineers, government officials, representatives of business
and industry, science journalists, students, educators, and laymen from many
countries will deliberate a wide range of subjects.
"Science and Man in the Americas" is designed to show how science and technology
impinge on society at large. Objectives of the meeting are to present, in
full public view, topics central to the future development and well-being
of the western hemisphere; to communicate the conclusions of these discussions
widely; and to generate, especially among young people, a dedication to improve
the conditions of life in the Americas.
The conference is intended to join the interests and talents of scientists,
engineers and laymen from the academic sector, from business and industry,
and from government in stimulating and innovative ways with the expectation
that knowledge exchanged and relationships established will be of significant
long-term benefit to individuals and to nations.
Man's Need For Green
Are human beings "genetically programmed" to require warm humid air and growing
green plants and the
presence of warm-blooded animals in order to lead full and satisfying lives?
Many authorities in the anthropological, sociological and medical sciences
have come to answer that question with an emphatic yes.
Now the American Nurseryman reports that the Horticultural Research Institute
is involved in supervising and supporting authoritative research into the
subject. The findings should be of importance to the nursery industry as well
as to the entire area of environmental concern. The project is under the direction
of Dr. Hugh Ells, taxonomist at the University of Wisconsin in Madison.
Dr. Iltis explains the rationale behind his research in this way: "Man, the
animal, evolved in nature among plants, shrubs, trees, flowers and fruits,
in a seasonal climate in which the living ecosystem was an integral part of
his most basic being and functioning. Thus, civilized man needs these facets
of the environment not as luxuries and amenities but as absolute and inalienable
rights of his biological body." The theory, while not proved or disproved
in the past, has generated much interest in the scientific community.
A major objective of the HRI study is to develop an annotated and interrelated
bibliography on man's needs for nature, starting with folklore and literature
and continuing into medical, psychological and sociological works and research.
THE AMERICAN SOCIETY OF PLANT TAXONOMISTS (ASPT) is pleased to announce formation
of a new Section for American Systematic Collections (SASC). The purpose of
the SASC is to provide a forum and mechanism for consideration of problems
of support, development, safety, and exploitation of the botanical collections
resources upon which the science of plant taxanomy and its ancillary fields
depend. Several studies have forcefully set forth the need for action to bolster
our resource collections and make more adequate provision for their future
preservation and availability, but action demands a body of concerned, industrious
per-sons involved with the use, curation, and maintenance of collections.
The SASC is such a body. The larger and more representative it becomes, the
more adequate will be consideration of all prospects and problems, and the
stronger will be its voice.
Membership in the SASC is open to all without charge. You do not need to
be a member of the ASPT to join, although there are advantages to this affiliation,
such as expected publication of items of general interest to the Section in
Brittonia, the official organ of ASPT.
If you have a stake in the future of collections and collections-related
resources, if you want to have a say in developing better support for and
recognition of the problems of collections, if you wish to have the ready
sup-port of your colleagues for problems of your own, please join in the work
of this Section. Send your address to: Dr. Willard W. Payne, Chairman of the
Executive Board, ASPT-Section for American Systematic Collections, Department
of Botany, University of Illinois, Urbana, Ill. 61801.
FIELD BIOLOGY ON NANTUCKET ISLAND, MASSACHUSETTS; Two courses in field biology
will be offered at the University of Massachusetts Nantucket Field Station
this summer. The first, Biology 550, will be held in early summer (June 4
through July 13, 1973) and is designed for advanced students with previous
experience in field work. This course is run on an individual research project
The second course, Biology 500, is offered in late summer (July 16 through
August 24) and is intended for students with no previous field experience.
Students and staff participate in lectures, field trips and seminars. Students
plan and carry out individual ecological projects and are required to write
a paper summarizing their results.
Admission to both courses depends on the recept of an acceptable project
Interested persons should contact Dr. Wesley N. Tiffney, Jr., Biology Dept.,
University of Massachusetts/Boston, 100 Arlington St., Boston, Mass. 02116.
(After June 1, P. O. Box 756, Nantucket, Mass. 02554.)
THE SIXTH ANNUAL MEETING OF THE AMERICAN ASSOCIATION OF STRATIGRAPHIC PALYNOLOGISTS
will be held at the Grand Hotel, Anaheim, California, U.S.A. from October
16 to 20. October 16 will be devoted to a Forum on Dinoflagellates, which
will be organized by Dr. W. R. Evitt. The forum is intended to serve for the
exchange of information on problems of dinoflagellate identification, classification,
stratigraphic ranges, paleoecology, and geographic distribution. There will
be handout charts, a panel discussion by invited specialists, topical presentations,
and discussion of questions of general interest submitted by the membership.
Technical sessions will be held from October 17-19. A half-day field trip
is scheduled to San Diego on the afternoon of October 18 to contrast the turbidite
deposits of the Rosario Formation (Upper Cretaceous) with the shallow marine
deposits of the Del Mar Formation (Eocene). A full-clay field trip to Sequoia
National Park will depart from Anaheim on the evening of October 19. This
trip will focus on the ecology of the "Big Tree", Sequoiadendron giganteum.
A demonstration of the computerized retrieval of palynomorphs according to
stratigraphic, taxonomic, and geographic parameters will be held during the
evening of October 18. Additional details are available from Dr. K. M. Piel,
Union Oil Research Center, Brea, California 92621, U.S.A.
JOINT MEETING OF THE AMERICAN SOCIETY OF PHARMACOGNOSY AND THE PHARMACOGNOSY
AND NATURAL PRODUCTS SECTION OF THE ACADEMY OF PHARMACEUTICAL SCIENCES, will
be held at the Atlantic Carriage Inn, Jekyll Island, Georgia, July 15-20,
1973. The SYMPOSIUM: "BIOTRANSFORMATIONS AND FERMENTATIONS". Monday, Tuesday,
and Wednesday mornings will be devoted to a symposium. The speakers will include
Dr. Oldrich Sebek (The Upjohn Co.)—Microbial Transformations of Antibiotics;
Dr. Donald Brannon (Eli Lilly & Co.)—Microbial Production of Pharmacologically
Active Compounds Other Than Antibiotics; Dr. Arnold Demain (Mass. Institute
of Tech.)—Biochemistry of Penicillin and Cephalosporin Fermentations;
Dr. Brian Ellis (Trent Univ.)—Degradation of Aromatic Compounds in Plants;
Dr. Warren Steck (Nat'l Res. Council of Canada)—Biotransformations in
Plant Tissue Cultures.
Dr. William K. Purees, Chairman of the Department of Biological Sciences
at the University of California, Santa Barbara, has accepted an appointment
as Executive Officer of the Biological Sciences Group at the University of
Connecticut. The appointment is effective August 15, 1973.
The Biology Department at Yale wishes to announce the following botanical
appointments and promotions. Professor Margaret B. Daccis of the University
of Michigan has been al.. ointed Professor in the field of Plant Ecology;
Joseph S. Ramu.s, an algal cell biologist, has been promoted to Associate
Professor and James E. Rod-man of Harvard University has been appointed Assistant
Professor in the area of Plant Systematics.
CLEMENT GRAY BOWERS 1893-1973
Clement Gray Bowers, eminent plant scientist, author and hybridizer of note,
died on April 12. A native of Binghamton, New York, Dr. Bowers was considered
one of the world's leading authorities on rhododendrons. In 1960 he received
the Jackson Dawson Medal, an honorary award given by the Massachusetts Horticultural
Society. At that time his book, Rhododendrons and Azaleas (1936, second edition
1960) was cited as "one of the true classics of garden literature."
Dr. Bowers received B.S. and M.S. degrees at Cornell University in 1923 and
1925 and a Ph.D. in botany from Columbia University in 1930. His doctoral
research was based on cytological studies in the genus Rhododendron.. His
early research in genetics, cytology and plant sterility was carried on at
the New York Botanical Garden. Dr. Bowers later pursued an in-dependent career
in plant breeding and as a horticultural consultant and lecturer. He discovered
the origin of viscin strands in some plant pollens and developed new techniques
in plant hybridization.
His interest in education continued and led him to serve as a lecturer in
botany at State University of New York units at Syracuse and Binghamton, New
York. In 1948 he was appointed a research associate in ornamental horticulture
at Cornell University. He was active until his death as a member of the Cornell
Plantations Faculty Committee and as a Sponsor of the Cornell Plantations,
the arboretum-natural areas enterprise of Cornell University.
He was a founder of Pi Alpha Xi, national collegiate honor society in floriculture,
and of the Men's Garden Club of Broome County. He was a member of many professional
societies, including fellowships in the Royal Horticultural Society of Great
Britain, the American Association for the Advancement of Science and the Botanical
Society of America. He was a charter member of the American Horticultural
Council and of the American Rhododendron Society and contributed to the long-range
planning of many horticultural organizations.
On the international scene, Dr. Bowers served as vice-chairman of the section
on plant breeding methods and as director of floriculture exhibits for the
Sixth International Congress of Genetics in 1932. In 1949 in London, he was
presented to Queen Mother Elizabeth as an "outstanding American scientist."
He was also a member of the International Committee for Horticultural Nomenclature
from 1952 to 1955.
ZIMMERMAN, MARTIN H., and CLAUD L. BROWN, with Melvin T. Tyree. Tree Structure
and Function. Springer-Verlag, New York, Heidelberg, Berlin. 1971. xii + 336
This is a book about the relationships between structure and function —
between anatomy and morphology and physiology — as these interact within
the framework of woody plants called trees. Because of the specialized nature
of the several subjects discussed, each author has written about the discipline
he knows best, and each chapter is a separate essay, with its own bibliography,
adequately cross-referenced to other sections. Claud L. Brown writes on primary
and secondary growth, and growth and form; Martin H. Zimmerman discusses transport
in xylem and phloem, and the storage, mobilization, and circulation of assimilates.
Zimmerman and Brown have enlisted the aid of Melvin T. Tyree to write the
chapter concerning the steady state thermodynamics of translocation in plants.
Useful author and subject indices complete the text.
Appearing as it does, some I() years after Kramer and Kozlowski's Physiology
of Trees, the present volume hopefully will establish a trend in the publication
of compendia on the physiological and structural phenomena which occur in
woody plants. By comparison with our knowledge of these phenomena in herbaceous
plants, there is a real paucity of data on woody plants. One excellent way
to point out what is known about woody plant physiology, and perhaps more
importantly, what is not known, is through such interpretative discussions
as appear in the Zimmerman and Brown volume. Within the limitations of publication,
these authors have performed a service to the scientific community, and especially
to those plant scientists with particular interest in the growth of woody
plants, in the tradition of Busgen and Munch who wrote on The Structure and
Life of Forest Trees in 1929.
Unlike Kramer and Kozlowski, our authors have concentrated on the biological
activities which take place within the tree and they emphasize the influence
of these activities on the growth and external morphology of these plants.
Kramer and Kozlowski have emphasized more the environmental aspects of tree
physiology and especially the reactions of tree species to differing environmental
conditions. As such these two books complement one another very profitably.
Because there is more known about the physiology and structure of trees of
the north temperate zone, there is a greater concentration in this volume
on such plants. Busgen and Munch neglected trees of tropical regions almost
entirely, but fortunately Zimmerman and Brown do consider physiological and
structural phenomena of tropical trees. In the chapter on growth and form,
however, one might have hoped for a discussion of the unique architecture
and growing patterns of some tropical trees along the lines developed by Francis
Halle. Even though now there is considerable information about apical meristems
and primary differentiation is arborescent monocotyledons — these are
tree-like, after all — the reader is merely referred to the studies
of Tomlin-son and Zimmermann. Similarly, cursory reference only is made to
the secondary growth which occurs in some tropical arborescent monocotyledons.
There is a
discussion, happily, of the path of water movement in the stems of these
arborescent monocotyledons coupled with a description of their unique vasculature,
and there are good sections on the organization of the phloem in these tropical
The text is generally well written and understandable but there appears to
be an unusual number of typographical errors and editorial inconsistencies.
There are also several grammatically questionable sentences which should be
changed. For example, at the top of page 42, we read: "The periodicity of
radial growth and growth ring formation in tropical trees and its [their?]
correlation with primary growth is [are?] even less [more!] poorly understood."
And on the top of page 160, "Light quality, i.e. the various wave lengths
of light, have [has!] been shown to effect [affect?] these same morphogenetic
processes quantitatively." Many times verbs do not agree with their subjects
in number. For example, middle of page 148: "The most plausible explanation
is that the sensitivity of cells in different tissues differ [s!]. . .'; bottom
of page 42: "... temperature and soil moisture is [are!]. . ."; and at the
beginning of first complete paragraph on page 239: "When the innermost layer
of the phloem, containing the functioning sieve tubes, are [is!] severed..."
In the table on page 195 measurements for the tracheids of conifers are listed
under the column headed, "Vessel [!] diameter, in microns." A thorough re-editing
would be very helpful.
It is high time that such organisms as trees were treated in the scientific
literature to an extent commensurate with their biological importance. With
the current-day emphasis on the living components of our environment —
and trees form an inestimably significant segment of the biosphere in many
parts of the world — Zimmermann and Brown's excellent volume contributes
appreciably to a much neglected aspect of tree study: structure and function.
William Louis Stern University of Maryland, College Park
HARBORNE, J. B. ed. Phytochemical Ecology. Academic
Press, New York, N. Y. 1972. 272 pp. $14.00.
This book is the eighth in a series of the Annual Proceedings of the Phytochemical
Society. This volume emphasizes the interactions between plants and animals
with three chapters devoted to plant interactions with other plants. Most
of the papers are concerned with how various natural plant metabolites e.g.,
alkaloids affect, in varying ways, the association of particular plants with
Miriam Rothschild reviews the recent work with aposematic (warningly colored)
butterflies and other in-sects. Both the benefits to the animals which store
toxic compounds and the benefits to the toxic plant host are discussed. Papers
by J. M. Cherrett on leaf-cutting ants and H. F. Van Embden on aphids are
related to experiments attempting to determine why particular plants are selected
as food sources by these insects over other plants. Both papers present experimental
data which reveals that for the ants it may be more a case of leaf repellants
than leaf attractants which is the regulating factor while for the aphids
both nutrients and secondary metabolites appear to be involved with a major
role being played by amino acids.
Chapters by E. C. Bate-Smith on the types of compounds that are responsible
for flavor and T. A. Rohan on the biochemistry of flavor are reviews of current
theories on this attribute as a factor in plant-animal interactions. Together
these chapters relate the difficulties of research in this area and how various
chemicals are undoubtedly the reason why some plants are avoided in preference
to others even though there is variation among animals as to whether particular
plants taste bad. A chapter by G. W. Arnold and J. L. Hill is specifically
concerned with the chemical factors which play a role in food selection by
ruminants. This chapter relates well with the previous two since it presents
experimental data on attempts to determine the types of chemical compounds
which repel grazing animals.
Cyanogenic glycosides are discussed by D. A. Jones, who presents the biochemistry
of cyanogenesis and the possible roles of these compounds as repellants. He
also discusses the ecological genetics of cyanogenesis. The chapter by M.
O. Moss on aflatoxin and other mycotoxins brings the importance of secondary
metabolites somewhat closer to man than some of the previous studies in this
book. The history of aflatoxin discovery and the species of fungi which are
presently known to synthesize these toxins are discussed. Selenium toxicity
is reviewed by A. Shrift. In this chapter the biochemistry of selenium assimilation
is detailed and biochemical evidence that selenium replacement of sulfur in
proteins accounts for the toxicity of this metal. Toxic amino acids, their
discovery and activity as antimetabolites, in the Leguminosae is reviewed
by E. A. Bell. He also discusses their possible function in the plants which
synthesize them. A. R. Mattocks reviews the pyrrolizidine alkaloids as a group
of poisonous compounds. The toxic effects are discussed on a gross level and
on a chemical level which reveals that pyrrole formed from alkaloids is the
The last three chapters deal with how plants affect other plants by the types
of chemicals they produce. C. H. Miller and C. H. Chou discuss phytotoxins
especially their role in controlling plant growth. Examples of air-borne toxins
and water-borne toxins are reviewed. The authors point out that the study
of phytotoxins is more easily approached as an ecological phenomenon and when
one attempts to understand the chemical nature of the toxicity it becomes
very difficult to assign the toxicity to specific chemicals considering the
very common occurence of many of these chemicals in the soil. Phytoalexins,
compounds which "ward-off" infection by fungi and bacteria re reviewed by
B. J. Deverall. In this paper the author reviews the concept of phytoalexins
and the types of chemicals which produce inhibitory effects. Also discussed
is the author's work with chocolate spot disease of Vicia fabae and anthranose
of bean plants and the role of phytoalexins in preventing infection by the
causative agents. W. G. H. Edwards discusses Orobanche and other plant parasites
with regard to the importance of chemical stimulants of germination. There
is also some discussion of the probable hormonal nature of the continuation
of parasite seedling growth and later attachment to the host.
In summary, this book is recommended for
phytochemists who are especially interested in the
possible functions of the great variety of so-called secon-
dary metabolites found in plants. The book is well in-
dexed by author, subject, and plant and animal species.
Philip C. Bibb
ZELITCH, ISRAEL. Photosynthesis, Photor-aspiration, and Plant Productivity.
Academic Press, New York. 1971. 347 pp. $15.00
Seldom has there been available a book which reviews research from the areas
of photochemistry and biochemistry of photosynthesis through the related leaf
cell morphology and the overall control of net carbon assimilation in crops.
This book treats these subjects and introduces a wide variety of topics in
the general areas associated with photosynthesis of plant productivity. It
begins with a discussion of plant cell morphology and
chloroplast structure, then proceeds to a very brief coverage of the light
reaction followed by a chapter on carbon dioxide fixation. The emphasis of
the book comes with the chapters on respiration, photorespiration and glycolate
metabolism which make up nearly one third of the total number of pages. This
emphasis is not unwarranted since it is one of the author's research areas
and a very important segment of photosynthesis research in the past ten years.
The final section of the book deals with photosynthesis, its control in single
leaves and control (both environmental and physiological) of total productivity
in stands. Since the book comprises less than :300 pages it necessitates a
rather brief coverage of most topics. For this reason it may be of less interest
to research workers in these areas but very useful for teachers and advanced
students in plant physiology, agronomy, and horticulture. Zelitch has freely
provided original graphs and tables along with 37 pages of references. It
should make an excellent text for an advanced course in the area of plants
productivity or as a supplement to plant physiology courses. The reader should
however be aware thktt the author weighed the discussion of photorespiration
in the direction of his ideas and perhaps another review of this subject should
be consulted for balance. Donald Miles
University of Missouri GRIFFIN, D. M. Ecology of Soil Fungi. Syracuse Univ.
Press, Syracuse, N.Y. 1972. 19:3 pp. $9.95.
Prospective readers of this book are referred to the Preface, where the author
identifies his intended audience as "senior undergraduates and graduate students
in the earlier years of their research." I believe he achieves his purpose
and such readers should find the book very worthwhile.
The text is written in a somewhat informal style which this reviewer found
most agreeable. The language is uniformly clear and unambiguous. More advanced
students, or those seeking a minutely detailed treatment of this vast and
burgeoning subject, are advised to look elsewhere. The author provides an
excellent picture of the "skeleton" of the ecology of soil fungi and leaves
the reader the option of fleshing the skeleton out with the list of references.
The references are carefully selected for the benefit of those desiring additional
details on specific subjects.
Part One of this book deals with the "General ecology of soil fungi." This
section is sparse in detail but it is logical and comprehensive in organization.
The author displays some refreshing candor in this section through occasional
challenges of traditional dogma and admission of general absence of knowledge
of certain aspects of the subject. His identification of problem areas should
prove stimulating to many readers.
Part Two of the book deals with the "Physical ecology of soil fungi." The
author may have over-stepped his mark somewhat here as beginning students
may not be adequately prepared for the physics and mathematics used in the
presentation of some of the physical concepts. However, this should not be
considered to be either a criticism or a shortcoming of the book. The serious
student will recognize this as material which he can and should master and
established workers will welcome it as one of the few authoritative treatments
of this largely neglected but critical aspect of fungal ecology.
In summary, this book provides an excellent perspective of a very complex
subject. The content and style of presentation are particularly well-designed
to inform the novice and should provide a strong stimulus for further study.
This book is highly recommended to its in-tended audience. David
Univ. of Florida SAN PIETRO, ANTHONY (ed.). Methods in En-
zymology: Volume XXIII - Photosynthesis, Part A.
Academic Press, New York 1971, 743 pp. $29.50
The aim of this volume is to provide a comprehensive coverage of the biochemical,
biophysical, genetic, and physiological aspects of photosynthesis and the
methodological approaches which have been derived for each. In both respects
this volume succeeds very well. The presentations in this particular volume,
which is Part A of a two-part series, considers isolation and culture techniques
of algae, bacteria, and diatoms; plant tissue culture; preparation and properties
of mutants; cellular and sub-cellular preparations from photosynthetic organisms
and finally the purification and properties of the components of the photosynthetic
There are a total of 69 articles incorporated into this volume. In Section
I, "Isolation and Culture Techniques" there are two articles on enrichment
techniques, five on synchronous cultures, and one each on tissue culture and
large-scale growth of algae. Section II includes six articles on the "Preparation
and Properties of Mutants." In Section III on the "Cellular and Subcellular
Preparation" there are 17 pakiers which cover such subjects as: chloroplasts
and grana, chromatophores, subchloroplast fragments and subchromatophore fragments.
Section IV on "Components" comprises over half of the volume. In this section
there are :37 articles covering a vast range of subjects e.g. cytochromes,
nitrate reductase, acyl lipids, ribulose diphosphate carboxylase, carotenoproteins
and leaf peroxisomes.
In each of the articles in this volume the methods of preparation and experimentation
are described in great and careful detail. Each procedure and technique is
discussed thoroughly and in many cases more than one procedure is given for
the same isolation or reaction. Each article also uses citations and references
quite freely so that the reader can have at his disposal a rather complete
bibliography related to each of the individual contributions. Another excellent
feature of this work is the extensive usage of illustrative material such
as tables and graphs. In this way the author can present his techniques and
results in such a manner as to permit the reader to follow the procedures
with some degree of confidence that his own experimental procedures are being
This volume should be of great asset to anyone interested in the field of
biochemistry or physiology. Since the subject matter is so diverse the significance
of this volume will be different for each individual. The material contained
in the book should be excellent for both one's own research as well as the
teaching of rather sophisticated laboratories in the fields of biochemistry
and physiology. Richard L. Mansell
Univ. of South Florida
TSO, T. C. Physiology and Biochemistry of Tobacco Plants. Dowden, Hutchinson
& Ross, Inc., Stroudsburg, Pa., 1972. :393 pp. $24.50.
The author states in the preface "This monograph is a source book for research
scientists interested in plant physiology and biochemistry in general, and
tobacco in particular." I find this statement truly describes the nature of
the material examined and for whom the book was written. It is indeed a monograph
in which varied topics are reviewed and documented with pertinent and complete
references to original papers. The volume is divided into six major parts
which treats plant and tobacco types, growth and development, post-harvest
handling, organic metabolism, leaf usability, and production and regulation.
Three-fourths of the pages are included in chapters dealing with growth and
development and organic metabolism.
Dr. Tso introduces each chapter with general statements that basically outline
what is known in that particular area of research, especially with tobacco.
The topics are then developed on the basis of information found in the literature.
This approach results in a review of each subject which is supplemented in
most cases by only brief discussion. Original data is reproduced to a limited
extent; perhaps more use of this technique would have decreased descriptive
details and allowed more discussion of the various researches. Dr. Tso is
eminently qualified for discussing and interpreting the works of others, since
he has personally been involved in much of the research done with tobacco
Each chapter has been written with a great deal of care. The reference material
has been expertly interwoven into the body of the text making it easy to read.
It is clear that the author has not simply scanned abstracts, but has read
details of the papers and then integrated them into a coherent topic for each
chapter. Some early 1900 articles are cited, but the most extensive coverage
is derived from research published during the 1950s and 60s through 1971.
An important aspect not to be overlooked is the authors summary of each chapter.
A general state-of-the-art is given followed by probing statements that separate
evidence from conjecture. Furthermore, Dr. Tso often projects which directions
research should be pursued to advance understanding of the subject under consideration.
Besides a typical subject index, the book contains an author index which
indicates both the page on which the complete reference appears and the page
on which they are cited. This greatly enhances the usefulness of the volume
as a reference text.
The chapter on seed and seedling growth examines seed storage, chemical composition,
viability, factors influencing germination, and growth kinetics. The coverage
is comprehensive and illustrates how most topics in the book are examined.
As part of the chapter on mineral deficiency, a series of color plates has
been included to illustrate characteristic mineral deficiency symptoms of
tobacco plants. The photography and reproduction are excellent; instructors
and students of plant physiology will find these an informative asset to their
The treatment of carbon-nitrogen balance, enzymes, carbohydrates, organic
acids and pigments (Chapters 17-21) is brief and of limited usefulness in
terms of specific information; the value of these chapters can be counted
in the reference listings. In contrast, however, Chapters 23 and 24 examine
alkaloids and phenolics more extensively, providing details and discussion
in addition to literature citations. This more complete coverage, of course,
stems from the importance of these compounds in tobacco.
The book is well-written and covers nearly all aspects of tobacco biology.
Although the plant physiologist and biochemist would appreciate and have some
utility for the book in research and upper division courses, its greatest
value would be to the plant scientist working with tobacco or closely-related
plants. For these people, the monograph is highly recommended. Richard
Arizona State Univ.
GENTRY, H. S., The Agave Family in Sonora. United States Department of Agriculture,
Agriculture Hand-book No. 399, Washington, D.C., 1972. 192 pp. 72 illus.,
Gentry has written an intriguing book of systematic and evolutionary significance
summarizing his many years of research on the Agavaceae in Sonora, Mexico.
The book is divided into two sections. The first forty pages considers a wide
range of subjects including the ecology, animal associations, economic botany,
history, morphology and species concepts of the Agavaceae. Although all systematists
may not agree with Gentry's species concept, he has made an admirable attempt
to establish a base line definition of species in the Agavaceae that future
workers of this taxon can use in their research. The use of floral ideographs
to depict the range of morphological variation in a species group, on distribution
maps, is a meaningful and clever application of Andersonian technique.
The systematic treatment which occupies the remain-der of the book begins
with a key to the genera of the family followed by keys to the species in
each genus. Each species is described and well-illustrated with line drawings
andlor photographs. In some cases habitat photographs are provided. In addition
to the general description of the species, Gentry has provided a vast amount
of data about the natural history, biology, and economic botany of some of
the species. His use of the personal narrative, as well as his many personal
experiences with this group of plants, makes material which is normally tedious
reading to all except the specialist in a group entertaining where possible
without the loss of scientific integrity.
The book is readable for both the professional and layman and, where necessary,
the excellent glossary defines many terms primarily associated with this plant
family. The book will be of special interest to those people living in the
southwestern United States where members of the Agavaceae included in this
work are often grown as garden and atrium plants. W Hardy
Miami Univ. (Ohio)
STREETS, R. B. The Diagnosis of Plant Diseases The
University of Arizona Press, Tucson, Ariz. $4.95.
The Diagnosis of Plant Diseases by Rubert B. Streets, Sr. as the description
on the cover indicates is "A field and laboratory manual emphasizing the most
practical methods for identification" of plant diseases. It is, however, much
more than that. Within the manual lies a fund of information organized in
a straight forward manner documenting information that will be useful to those
curious about the problems of their favorite plants or crops.
The introductory chapter is packed with common sense and focuses on the background
of experience which Dr. Streets has acquired during 44 years of dealing with
people having plant problems; from those retirees with their misplaced "lilies-of-the-valley"
in the Arizona desert to the big crop production specialists who will "sue
you" on your first incorrect diagnosis.
The second chapter establishes many of the principles upon which successful
extension plant pathology is based. From the treatment of the "hopeless cases",
advice on not "taking sides", to the proper "bedside manner" for the ex-tension
man, the chapter is filled with information couched in useful terms and touched
with the right amount of humor to make his serious points palatable. The concepts
and establishment of a plant disease diagnostic clinic are detailed in the
manual: included is practical information on disease identification forms,
equipment for diagnosis, and selected chemical formulations for accomplishing
particular steps in specimen preservation and identification.
The collection and recording of samples is the subject of chapter three.
Sampling, field collections, record taking, and steps in diagnosis are all
topics which would be valuable in an advanced course in plant disease diagnosis.
A particularly useful section of this chapter describes making photographic
records of specimens. Lighting, magnification, and the choices of black and
white, color, or infrared films are discussed from the point of view of taking
Special methods for the preparation of difficult-tohandle specimens are covered
in chapter four which is filled with tips for inducing sporulation of fungi
on various plant parts and techniques for examining tissues. Many symptoms
shown by these techniques are well illustrated by photographs.
Chapters five through ten constitute somewhat over half the manual and contain
the essential keys needed for the diagnosis of nonparasitic diseases including
nutrient deficiencies and excesses, and various unfavorable environments;
bacterial diseases, nematodes, virus and mycoplasma diseases; imperfect fungi,
myxomycetes and phycomycetes; ascomycetes, and basidiomycetes. Accompanying
photographs and line drawings simplify the task of keying down diseases and
causal agents. Although not comprehensive, the manual covers the majority
of problems found on most crop and ornamental species.
Concluding the manual is an index to references "chosen for their usefulness
in diagnosis of plant diseases". This list of 44 citations is well documented
and should form the backbone of any extension plant pathologist's library.
As is clear from the opening preface to the end of the manual, Dr. Streets
has provided precisely the sort of in-formation which is needed to help redirect
the course of plant pathology which today is leaning so heavily toward basic
research that it is in danger of losing public support. Already in its 2nd
edition and third printing, the manual has been widely used by plant pathologists
throughout the world. It is my impression that many volumes of The Diagnosis
of Plant Diseases will become dog-eared and be replaced, for on every page
can be found the kind of in-formation which will repay the reader many times
the modest cost of the manual.
Paul H. Williams University of Wisconsin
HEYWOOD, V. H., (ed.) The Biology and Chemistry of the Umbelliferae. Academic
Press, New York, 1971. x + 438 pages. $26.00
The Umbelliferae is a cosmopolitan family of considerable botanical, medicinal
and economic interests. This volume, based on papers presented at an international
symposium under the auspices of the Linnean Society in association with the
Phytochemical Society, at-tempts to bring together various aspects of the
biology and chemistry of the family. The intent is two fold; to provide interchange
among the world's leading umbellifer experts and to provide others with a
substantial interest to gain both breadth and depth in comprehending this
distinctive family. These purposes are achieved with distinction.
PLANT SCIENCE BULLETIN
LIFE SCIENCE BUILDING
UNIVERSITY OF SOUTH FLORIDA TAMPA, FLORIDA 33620
While the work is confined to the taxonomic entity Umbelliferae, it is much
more than a systematic account in approach and content. The contribution by
J. W. Fair-bairn on the alkaloids of poison hemlock includes aspects of development,
biosynthesis and activity as co-enzymes of conline and related compounds.
In an analysis of breeding systems and floral biology, C. R. Bell, proposes
an evolutionary relationship between primitive promiscuous pollinators and
the basic floral uniformity of the umbels. The concluding chapter by D. H.
French summarizes the ethnobotanical significance of the family on a world
wide basis. These topics exemplify the breadth of the treatment of this family
in terms of both biological phenomena considered and the multifaceted approaches
to the topics by the participants.
The topics tend to collect around three centers of interest. A current assessment
of the relationships and classification of the family is provided by a historical
perspective (L. Constance) followed by papers on the Umbels of the New World
(M. Mathias), the Old World (V. H. Heywood), New Zealand (J. W. Dawson) and
concludes with an interpretation of the Umbellales (R. L. Rodriguez). Distinctive
aspects of this family form a second cluster of topics. Included are comparative
studies of development (W. L. Theobald), stoma (M. Guyot), fruits (V. H. Heywood
and K. M. M. Dakshini) and pollen morphology (M.-Th. Cerceau-Larrival). Chromosome
analyses of the family (D. M. Moore) and a genus (A.-M. Cauwet) are also included.
The biosynthesis, function and particularly the distribution patterns of
a wide array of chemical sub-stances comprise the third topical array. After
a general evaluation of patterns of distribution of chemical sub-stances in
the family (R. Hegnauer), more detailed papers on acetylenic compounds (F.
Bohlmann) flavonoids (J. B. Harborne) and coumarins (B. E. Nielsen) are presented.
Serological comparisons within the Apioideae (J. L. Pickering and D. C. Fairbrothers)
and chemosystematics of the Saniculoideae (K. Hiller) illustrate the utilization
of chemical evidence at the sub-family level.
Clearly, this volume contains ideas and information pertinent to biologists.
generally as well as those with deeper fascinations with the Umbelliferae.
The extensive literature citations which enhance each paper, collectively
assure it the status as a significant reference source for this family. While
papers of diverse authorships are distinctive in approach, they are of excellent
quality and are presented in a handsome, well constructed book, which might
well be emulated by others with an equivalent goal for major plant families.
Bert G. Brehm Reed College
PLANT SCIENCE BULLETIN LIFE SCIENCE BUILDING UNIVERSITY OF SOUTH FLORIDA TAMPA,