. Our native ferns and their allies : with synoptical descriptions of the American Pteridophyta north of Mexico. Ferns. no Our Native Ferns * Stipes obscurely Jointed near the base; cilia of the indusiutn long^ inflexed over the sporangia. t Fronds thickly clothed underneath with rusty bristle-like chaff, ^ > r. * W. Ilvensis, R. Br. Fronds broadly lanceolate, smoothish above, pinnate; pinnae crowded, sessile, pinnately-parted, the crowded segments olDlong, obscurely crenate ; sori near the mar- gin, somewhat confluent when old. ( W. ruftdula, Beck., Acrosti- chum Ilvense, L., Polypodium Il
. Our native ferns and their allies : with synoptical descriptions of the American Pteridophyta north of Mexico. Ferns. no Our Native Ferns * Stipes obscurely Jointed near the base; cilia of the indusiutn long^ inflexed over the sporangia. t Fronds thickly clothed underneath with rusty bristle-like chaff, ^ > r. * W. Ilvensis, R. Br. Fronds broadly lanceolate, smoothish above, pinnate; pinnae crowded, sessile, pinnately-parted, the crowded segments olDlong, obscurely crenate ; sori near the mar- gin, somewhat confluent when old. ( W. ruftdula, Beck., Acrosti- chum Ilvense, L., Polypodium Ilvense, Swz., Nephrodium rufidu- lum^ Michx., Aspidiunt rujidulum, Willd.) Va. to Ky. westward and northward. II. ft Fronds glabrous or nearly so. 2. W. hyperborea, R. Br. Stipes and rachis sometimes slightly hairy; fronds linear-lanceolate, pinnate; pinnae cordato-ovate, pinnatifid with few (5—7) broadly obovate entire lobes. Vt., N. Y. and northwestward. II. 3. W. glabella, R. Br. Smooth and naked throughout; fronds linear, tapering slightly below, 2^—5^ high, pinnate ; pinnae deltoid or ovate, the lower rather remote, cut into 3—7 rounded or sub- cuneate entire lobes. Vt., N. Y. and northward. II. ** Stipes not jointed; cilia of the indusium very shorty hidden by the sporangia. 4. W. scopulina,* D. C. Eaton. Rootstock short, creeping, very chaffy; stipes 2^—^' long, puberulent like the rachis and undeT surface of the frond with minute flattened hairs and stalked glands ; fronds lanceolate, 4^—8^ long, pinnate ; pinnae numerous, oblong-ovate, pinnatifid with 10—16 short ovate or oblong toothed divisions; indusia very delicate, deeply cleft into laciniae which ^ terminate in short hairs. Col., Ariz., Cal., Ore. and northward. IV. /fyi^i^i^^ ?'f / tw, dividing at the end into articulated hairs; sporangia nearly sessile. Ariz., N. Mex. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - color
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Keywords: ., bookauthorunderwoo, bookcentury1800, bookdecade1880, bookyear1881
