Index Filicum A Synopsis With Characters Of The Genera Extensively Illustrated And An Enumeration Of The Species Of Ferns With

Author : Thomas Moore
Publisher : Forgotten Books
ISBN 13 : 9781333403027
Total Pages : 564 pages
Book Rating : 4.4/5 (3 download)

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Download or read book Index Filicum written by Thomas Moore and published by Forgotten Books. This book was released on 2016-08-30 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Index Filicum: A Synopsis, With Characters, of the Genera, and an Enumeration of the Species of Ferns, With Synonymes, References, &C. &C In the prefixed Synopsis of the Genera, the author has sketched out What appears to him the most intelligible arrangement, as well as endeavoured to simplify the definitions of the generic groups. As regards the genera themselves, it has been an endeavour to hold a middle course, between the excessive sub-division and the equally inconvenient non division of the older genera. The system of classification adopted, is that based upon the joint recognition of (1) the plan on which the vascular structure is developed, and (2) the nature of the fructification. This is the best plan yet devised, and if carried out with moderation, not to excess, and with a well-defined appreciation of what constitutes an important distinction, it is Open to fewer objections and presents fewer difficulties than any other plan which has been suggested. It has nevertheless appeared, that in the application of this system, the number of genera has been hitherto too much extended; consequently those which are regarded as less ne cessary or most trivially characterized, dependant on the slighter venal and other differences, have not been adopted; while those based on the broader differences of venation, such for instance as are presented by free-veined and netweined species, and again among the latter such as occur in a uniform or a pinnate plan of reticulation, or in the presence or absence of free included veinlets, have been unreservedly admitted. 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.