< UYPTOGAMIA FILICES. 449 



* * * Capsules destitute of a ring, adnate at the base, subglobo&e, coria- 

 aceoiis, opake, not cellular, semibivalved. 



419. OPHIOGLOSSUM. Capsules naked, upon an articulated dia- 

 tichous spike, transversely opening, 2-valved. 



420. BOTRYCHIUM. Capsules subglobose, adnate to the rachis of 

 the compound spike, distinct, naked. 1-celled ; valves 2, connected 

 behind, transversely opening. 



LYCOPODINEJE. 



421. LYCOPODIUM. Capsules 1-celled, axillary, sessile; some of 

 them 2-valved, filled with a farinaceous substance ; others 3-valved, 

 containing from 1 6 globose corpuscules. 



EQUISETACEJE. 



422. EGlUISETUM. Fructification terminal, spiked, consisting of 

 peltate polygonous scales, on the under side of which are from 5 7 

 follicular involucra opening longitudinally on the inside. Sporae in- 

 cluded in the involucrum, numerous, (green,) globose, with 4 fila- 

 ments at the base which are dilated at the extremity. 



CRYPTOGAMIA. 

 FILICES. 



Species. 411. POLYPODIUM. 



P. vulgare : fronds deeply pinnatifid ; segments linear-lanceolate, ob- 

 tuse, crenulate, approximate ; the upper ones gradually smaller ; cau- 

 dex chaffy; stipe smooth. 



HAB. Shady rocks. July. Fronds 8 12 in. high, smooth ; segments, 

 3 4 lin. broad, somewhat curved. 



P. hexagonopterum : fronds bipinnatifid, rather smooth, circumference 

 triangular, two of the lower divisions deflexed ; segments lanceolate, 

 obtuse, ciliate, the upper ones very entire, the lower ones incisely cre- 

 nate ; the lowest adnate-decurrent ; sori minute, solitary ; stipe smooth. 



HAB. Moist woods. Aug. Fronds 12 in. high, very broad ; divi- 

 sions acuminate, separate. 



412. HYPOPELTIS. 



H. obtusa. 



HAB. Rocky woods. Aug. Fronds 8 14 in. high, biplnnate : di- 

 visions subr emote ; segments oblong, the lower ones crenate-dentate f 

 rachis pubes. above ; sori subconftuent. 



