On Saturday, April 8th, a fat volume of botanical
and ecosystem science was introduced to Chicago Region conservationists with a
symposium and reception at the Chicago Botanic Garden. In his opening speech Arnold Randall, Superintendent of the
Cook County Forest Preserves, highlighted the impressive fact that authors
Gerould Wilhelm and Laura Rericha had worked on the new Flora of the Chicago Region for more than 100,000
hours over 17 years.
Speaking for the Botanic Garden, Dr. Greg Mueller pointed
out that Chicago region has been a leader in the development of citizen science
and stewardship, and that this community has been eagerly anticipating this
book.
Lead author, Dr. Gerould Wilhelm (Jerry), said that the new Flora is not another
edition of “Plants of the Chicago Region.” Wilhelm had joined author Floyd
Swink as junior author for the 3rd edition of that book (published
by the Morton Arboretum in 1979) and for the famous 4th edition,
published by the Indiana Academy of Sciences in 1994. From the beginning, Swink
had sought to make botany more accessible to non-experts and to include species
associations, invaluable to conservationists working to restored degraded
lands. Those four editions of “Plants of …” had been a major foundation (or “the
Bible”) for the region’s botanical citizen scientists and stewards.
There were 2530 plants in the 4th edition. There
are 3149 in the new Flora. Some of those 619 new ones are invaders. Ten have
been newly described by botanists since 1994. But most resulted from each genus
being “revaluated.” For example, in the genus Rubus (raspberries and
blackberries) the key in 1994 divided our plants into 13 types. The 2017 key
requires us to discriminate among 43 types.
Most of the new ones are variants of what we’ve been calling
dewberry (Rubus flagelaris). Dewberries,
although mostly native, can be aggressive pests. Sometimes they’re controlled
by herbicide. Now stewards will want to determine if there are rare dewberries
among the pests. Fuller’s dewberry? Steele’s dewberry? Wheeler’s bristly
dewberry? It may not be easy. As the new
Flora comments, in an introduction to the Rubus key:
The student should not be daunted
by the number of taxa in this treatment. The species delineated here are …
floristically meaningful … Careful assessment of populations in the field may
be quite rewarding provided fully developed primocanes and floricanes are
secured … Casually collected specimens will result in frustration and possibly
ungracious thoughts about the parentage of our blackberries and dewberries.
I wonder if the authors were also concerned about frustrated
stewards having ungracious thoughts about the parentage of botanists.
As for “primocanes and floricanes” – the new Flora will for
most people require a great deal of back and forth to the glossary. It turns out that a trip from the Rubus page 960 to Glossary pages 1313
and 1316 reveals that a primocane is a first year shoot or “cane” (which does
not flower) and a floricane is a second year cane (which in season produces
flowers and tasty fruits). But since these definitions apply only to the genus
Rubus, couldn’t the definitions be provided on page 960? And wouldn’t the key
be more accessible to non-experts if the authors avoided the arcane terms and
used simply “first year canes” and “second year canes”?
A big part of this new book is zoological rather than
botanical. Junior author Laura Rericha has provided long lists of animals
(mostly insects) associated with the various plant species. If more people
study these species, conservation should be able to benefit. For example, if a
rare species of ant is present, and if monitoring shows it to be decreasing,
and if that decrease can be associated with an inappropriate burn regime (too
frequent, too seldom, or at the wrong season?), then remedial action can be
taken. A species of ant (or pollinator, or beetle) may have an important role
in an ecosystem, or not.
Rericha is working on keys that will help more people
identify and study our region’s ants and bees. In the new Flora, she has
provided on page 909 a key to more than forty types of oak galls – each made by
a different species of wasp or fly. Wilhelm pointed out that ecosystems and
species are complexly interdependent. In our bodies we have roughly the same number of human cells as we do bacterial cells, many of which are important to our health. Comparable relationships are critical for other mammals, birds, and all
animals. Most plants depend utterly on various fungi, bacteria, pollinators,
and other symbionts. The more we understand those relationships, the better we
will be as defenders and managers of ecosystems and the planet. We have a long
way to go.
I would like to congratulate Mr. Wilhelm and Mrs. Rericha (Anchor). I only realized the excellent deal we all are getting on this book after you mentioned the 100,000 hours of work they have done to complete it. I look forward to obtaining it and using it.
ReplyDeleteAt the North American Prairie Conference in Normal IL in July 2016, I introduced the "Field Biology Species Concept". FBSC emphasizes that species with different ecology and phylogeny are the species that are meaningful to field biologists. Mohlenbrock and others have created species based on morphological differences visible with only good magnification and attention to subtle differences. If ecological differences consistently exist such differences may distinguish really different species, but until ecological or phylogenetic differnces are demonstrated, I will ignore them, ie use older texts as you suggest.
ReplyDeleteApomixis is the formation of progeny without sex, so that progeny are genetically the same as the parent. In such case, which include the genus Rubus, there are no evolutionary rules for recognizing species, as each clone could be called a species. In the case of apomicts as with cross-breeding species the emphasis should be on distinguishing ecological differences.