Publisher's Synopsis
Excerpt from Memoirs of the Torrey Botanical Club, 1896-1899, Vol. 6
In answering these questions, the various ecologic factors which influence the distribution of lichens must be kept in mind. Those which have especially attracted notice in my studies are the par ticular kinds of substrata in a region; changes in these substrata through the destruction of old and the introduction of new ones naturally, or through some animate and commonly human agency climatic conditions of heat and moisture at present, and, in some instances, in the past as well amount of illumination; the effects of bodies of water in bringing moisture; direction of prevailing winds influencing temperature; permanency and age of substrata and elevation of land. Other factors will present themselves to the careful observer. What I have outlined here is intended to be merely suggestive, and, for more detailed account, I must give refer ence to some 250 pages in the papers cited above from the three authors named. It'is to be hoped that the important factors sug gested above as influencing lichen distribution, and any others which may be brought out in actual work in the field in the future may be kept in mind by lichen collectors; and, if this brief paper shall in any degree aid in bringing about this result, the improvement in results in the lichenological field of work will be ample reward. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
