. Our native ferns and their allies [microform] : with synoptical descriptions of the American pteridophyta north of Mexico. Ferns; Fougères. Fig. 3. Fig. 4. Fig. 3.—Enlarged sessile sporangium of Trichomanes radicans Swz. Fig. 4.—Sporangium of SchtMaa/w silia Pursh, showing the apical ring. Much enlarged. (Fig. 3). In the Sq^izmacem the sporangia are ovate, sur-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Underwood, L

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. Our native ferns and their allies [microform] : with synoptical descriptions of the American pteridophyta north of Mexico. Ferns; Fougères. Fig. 3. Fig. 4. Fig. 3.—Enlarged sessile sporangium of Trichomanes radicans Swz. Fig. 4.—Sporangium of SchtMaa/w silia Pursh, showing the apical ring. Much enlarged. (Fig. 3). In the Sq^izmacem the sporangia are ovate, sur-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Underwood, Lucien Marcus, 1853-1907. New York : H. Holt

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Keywords: ., booka, bookcentury1900, bookdecade1900, bookpublishernewyorkhholt