246 POLYPODIUM, § PHEGOPTERIS. 



red, fronds 6-10 inches long and quite as much or more 

 broad-triangular acuminate membranaceous pinnate, below 

 subbipinnate, lowest pinnfc the largest 4-6 inches long 1.7-2^ 

 inches broad semiovato-lanceolate iDipinnatifidor subpinnate, 

 the rest lanceolate more or less connecced by a blunt trian- 

 gular decurrent intermediate lobe deeply nearly to the rachis 

 pinnatifid with oblong subacuminated coarsely crenato-ser- 

 rate or entire segments, rachis and costse stramineous and 

 glossy, veins twice or thrice forked, veinlets bearing the mar- 

 ginal sori at the apex, costule and veins beneath often hairy. 

 —Mich. Fl. Bar. Am. ii. p27l. Siv. Syn. Fil. ;j. 40. Willd. 

 Sp. PI. V. p. 200. Hook, et Grev. Ic. Fil. t. 210. Asa 

 Gray, Man. of Bot. Illustr. p. 590. Phegopteris, Fee. 

 Metten. Phegopt. p. 15. 



Hal). North America, from Canada, Goldie, to New Orleans (Drummond) and 

 Florida (Chapman). — A larger and stronger growing plant than the preceding 

 species and rather more compound, and a triangular lobe is decurrent, as it were, 

 in the sinus, from the base of the pinnaz above (often coadunate, with the pinnae 

 below), giving a remarkable appearance to the whole Fern. As far as I know, it 

 is peculiar to eastern North America. 



**** Fronds bipinnate, rarely stibtripinnate. 177-188. 

 {Polystichoid. Habit of Vo\y&%ic\\\\m. 177-181.) 



177- P- (Phegopteris) rigidum, Hook, et Grev.; caudex 

 short very stout erect or ascending branching upwards 

 densely paleaceovis with large reddish-ljrown ovate long- 

 pointed ciliated scales mixed with smaller lanceolate ones, 

 stipites tufted 3 inches to a foot long more or less densely as 

 well as the rachis clothed with similar but smaller scales as 

 the caudex, fronds rigid-coriaceous from a span to 2 feet long 

 2-3 inches to a span broad usually oblong or oblong-lan- 

 ceolate but the larger forms sometimes a span broad bi-tri- 

 pinnate, ultimate pinnae very variable obliquely ovate or 

 subrotund more or less auricled, the margin nearly entire or 

 dentato-serrate with spinous teeth. — a, vulgare ; fronds ob- 

 long rather obtuse bipinnate, pinnse oljtuse, pinnules ovato- 

 rotundate unequally subrhomboidal generally auricled, serra- 

 tures few and spinulose as is the short acute apex. P. rigi- 

 dum, Hook, et Grev. Ic. Fil. t. 163, and in Bot. Misc. p. 239.* 



* At the same page of the Bot. Miscellany appear three other very imper- 

 fectly described Peruvian species oi PoUjpodiurn {P. stipitaturn, P.yracile, and 

 P.fulvcseens, of Hook, and Grev.) ; but as they do not exist in my herbarium, and 

 as I can otfer no further remarks in illustration, it is better to omit them. 

 These were published in 1831, when the Ferns of the Peruvian Andes were very 

 imperfectly known. 



