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Excerpt from The Polypodiaceae of the Philippine Islands, And, New Species of Edible Philippine Fungi The Polypodiace are distinguished from the other orders of true ferns by the character of the sporangium, which is usually stalked and provided with a longitudinal annulus interrupted by the stalk, and opening by a stomium at right angles to the annulus. In the field, and without the use of the microscope, they can be distinguished as a rule from other ferns by the following characteristics: They are rarely tree ferns, as are Marattiace and Cyatheace. They are not filmy in texture, as are Hymenophyllace. They are not dichotomously compound, like most of our Gleicheniace. They do not have climbing fronds, as do most of our Schizaeace. In the Philippines, as elsewhere in the world, the Polypodiace are several times more numerous than are all other ferns combined, and, therefore, a treatment of the order does not fall far short of being an entire fern flora. My attempt has been to collect and publish descriptions of all the ferns known to have been found in these Islands. It is likely that I have fallen considerably short of this goal, for in some groups the discrepancy between my number of species and the larger one given by Underwood is far greater than can be explained by any difference in our interpretation of specific limits. A history of the work on the ferns of these Islands would be superfluous, since the subject has been well handled within the past two years by both Merrill and Underwood. While I was engaged on this work practically no ferns collected before the American occupation were available for study in Manila. 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
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The Polypodiaceae of the Philippine Islands, And, New Species of Edible Philippine Fungi
Bokrecensioner » The Polypodiaceae of the Philippine Islands, And, New Species of Edible Philippine Fungi (Classic Reprint)
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