580 CRYPTOGAMIA FILICE9 



chaffy or membranaceous hair?, and tawny-forruginous,— the div.'siOis distinct, 

 subscssiie, L third to 3 fourths of an inch Long, ovate-lanceolate, or tenceolatc, 

 rather obtuse, deeply pinnatifid, with ovate-oblong obtuse entire segments, some* 

 what concave and chaffy l eneath ; common rackia chaffy and m< mbranaceously 

 pi lose ] stipe I to 3 or 1 inches long, somewhat chaffy and pilose, with a tuft of 

 tawny chaff at base. Sori near the mam in of the segments, finally confluent, with 

 the capsules slightly pedicellate ; frutusium beneath, or surrounding the ea| tules*, 

 opening and resembling a calyx, ciliate un the margin. 

 Hub. Rocky banks of streams ; Black Hock :. not common. Fr. June. 

 Obs. Collected by 1). TOWNSEND, E*\. 



2. W, Pf.nniMAXA, Hook. & Grev. Front! sub-bipinnate, minute- 

 ly glandular-pilose; divisions »atbcr distant, pinnate, or deeply pinna- 

 tifid ; segments oblong, obtuse, crenatc-serrate, the lower ones distinct ; 

 sori submarginal, finally subconlluent ; Btipe and rachis somewhat 

 chaffy. Beck, Bot. p. 452. 



Aspidium obtusum. If'illd. Sfi. 5. />* 254. .Mithl. Gated, p. 97. Pursh, 

 . im. 2. p. 602. Mitt. Gen. 2. p. 250. 

 Hypopeltis obtusa. Tow. Comp. p. 380. Eat. .Man. p. 1S5. 



Pe mux's WoonsiA. 



Frauds 3 or 4 to 6 or 8 inches long, and I to 2 or 2 and a balf inches wide, in 

 their outline lance-obiong, suh-l ij. innate, minutely glandular-pilcse, — the di vision* 

 nr pinnse dis:inci, sul sessile, half an Inch loan inch and half long (the upper and 

 lower ones shorter), ovate-lanceolate, pbtuse, pinnate near the base, deeply pin- 

 natitid towards the apex,— the segments or pinnules oblong, obtuse or rounded at 

 aj>ex, crenatc-serrate, ihe lower ones often crenately and pinnatifidiy incised, dis- 

 tinct, the others more or less confluent at base ; common riuliis slightly chaffy, or 

 membranaceously pilose above; stipe 2 to 3 inches long, chatly. Bori near the 

 margin of the segments, orbicular, finally almost continent ; indusiutn sub-hemi- 

 spheric, at length resembling a calyx, with small spreading denticulate segments. 



Hub' Rocky banks? Chester Creek, &c. frequent. FV. Jury. 



Obs. Collected by 1). Townsend, Esq, Two other specfes arc enumerated in 

 the U. Slates* 



464. A8PLENIUM. L. Nutt. Gen. 822. 

 [Greek, a, privative, and Splen, the spleen ; from its supposed medicinal virtues..] 



Sori linear, oblique, or somewhat transverse, scattered. Indusium su- 

 perficial, arising from the lateral veins, and opening longitudinally, 

 generally on the side towards the midrib. 



"(■ Frond mostly undivided* 



2. A. riitzophyllum, L. Frond lanceolate, stipitate, subcrenate, 

 smooth, auriculate-cordate at base, the point very long and attenuated, 

 often radicating at apex. Beck, Bot. p. 452. 



ROOTIKG-LEAVEI) AsPLKXIUM. 



Fronds 3 or 4 to 8 or 9 inches long, and I third of an Inch to an inch wide, at 

 base, where it is auriculate-cordate, and thence lanceolately tapering to a very 

 long sublinear acumination, which bends to the ground, and frequently throws owt 

 roots at the apex, producing a young and distinct plant (sometimes the frond is 

 bifid nearly to the base, having tieo long slender acuwinations); stipe 1 or 2 u>4 



