Our native ferns and their allies; with synoptical descriptions of the American "Pteridophyta" north of Mexico Underwood, Lucien Marcus, 1853-1907 creator text book New York Holt 1888 1888 3d ed., rev.
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ENG S&M A-5 GERSTM https://www.biodiversitylibrary.org/bibliography/19410 10.5962/bhl.title.19410 otu