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This is a reproduction of a book published before 1923. This book
may have occasional imperfectionssuch as missing or blurred pages,
poor pictures, errant marks, etc. that were either part of the
original artifact, or were introduced by the scanning process. We
believe this work is culturally important, and despite the
imperfections, have elected to bring it back into print as part of
our continuing commitment to the preservation of printed
worksworldwide. We appreciate your understanding of the
imperfections in the preservation process, and hope you enjoy this
valuable book.++++The below data was compiled from various
identification fields in the bibliographic record of this title.
This data is provided as an additional tool in helping to ensure
edition identification: ++++ Parmenides e Peri Ideon: Parmenides
Sive De Ideis Et Uno Rerum Omnium Principio Dialogus Plato, John W.
Thomson
The lichen genus Cladonia includes some of the very common ground
cover plants in the United States and Canada. Before the compiling
of this volume, the published results of research carried out with
respect to this lichen genus were widely scattered, in many
different languages, and often very difficult to locate or
translate. This manual is an extensive compilation of the available
information necessary for the identification of the members of
Cladonia in North America. The compendium includes a section on the
recently developed microchemical approach to the taxonomy of the
group, and in order to illustrate the microchemistry of the genus a
new series of photographs was taken especially for the book. One of
the most important components of the volume is the key. Until now,
no such key embodying the recent concepts of the taxonomy of the
genus and incorporating all the North American species has been
available, although there have been excellent regional keys. As a
working key and manual to the lichen genus Cladonia on the American
continent north of Mexico, this study will be a valuable aid to
professional lichenologists, botanists, mycologists, plant
ecologists, plant ecologists and naturalists.
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