A List of the Ferns and Fern Allies of North America North of Mexico

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1901 edition. Excerpt: ... A LIST OF THE FERNS AND FERN ALLIES OF NORTH AMERICA NORTH OF MEXICO, WITH PRINCIPAL SYNO-NYMS AND DISTRIBUTION. By William R. Maxon, Aid in Cryptogamic Botany, Division of Plants. In all the literature relating to American ferns and the so-called "fern allies," there have hitherto appeared but two systematic treatises of sufficiently wide scope to include the entire territory of North America north of Mexico, namely, the Ferns of North America, by Prof. D. C.-Eaton (1877-1880), and Our Native Ferns and Their Allies (in several editions, 1881-1900), by Prof. L. M. Underwood. The first of these. a monograph of two large quarto volumes, contains descriptions and colored figures of all species comprised in the groups known at that time as the orders Filices and Ophioglossaceae. The treatment is full but concise, the style clear, the figures for the most part excellent; and the work as a whole must be regarded as the founda-tion for all subsequent studies of North American ferns. Without its good influence it is unlikely that the present degree of progress could have been attained-but we should remember first of all that it represents a critical estimate of the groups as they were understood over twenty years ago, and that since its appearance there has elapsed a period marked by unexampled botanical activity and progress. There has been collected in the meantime abundant material of manv species either entirely new or then represented in herbaria by mere fragments, and with the aid of these specimens careful studies have been accomplished in the light of which not only new specific names have been proposed, but many changes in the older definitions of spe-cies have been shown to be desirable. If, then, we recognize that there have been and must...

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