426 OKDER 159. FI LICKS. 



1 A. acrostlclioides Swtz. Frond narrow-lanceolate, 1518'; stipe chaffy; pn 



talcate-lanceolate. ciliate-serrulate, 1 2'. auriculate on the upper side at base, the tip 

 per covered with frt.lt, smaller than the sterile. Rocky shades. Common. 

 . incisum. Segments incised and sharp-toothed, most of them fertile. N. Y.. .fee. 



2 A. Loiichitls Sw. Frond linear-lanceolate, rigidly erect, 8 18': pn. triangular- 



ovate, auricled on the upper side at base, longest (!') in the middle, gradually les- 

 sened to apex and base, all densely fertile. Lake Superior, and N. 



8 A. MUIIITUM. A splendid Fern from California, growing in clumps, 3 5f, smooth, 

 rigid, evergreen, lance-linear; segm. oblong-falcate, spinulou<j-serrate ; son 2-rowed 



4 A. FALCATUM. Frond thick, rich green, lanceolate, pinnate, 2 3f high, with ample 



lance-acuminate pinnae. A noble, hardy Fern from Japan. 



5 A. Florida! mm (Hook). Rigidly erect, lance-oblong, pinnate and barren below, 



bipinnate, fertile, and contracted above ; lower pinnae cut-pinnatifid : indusia largo, 

 round, peltate, as in No. 1. Ga., Fla., La. (A. Ludoviciana C-B.) 



6 A. aciilealuin Sw. /3. Itraunii. Fronds in tufts, dark green, '2 3f, pim.ate, 



lanceolate, narrowed both ways; stipe short, shaggy with large scales; segm. o%ate- 

 falcate, auricled on the upper side, bristle-tipped. Mts., Vt. (Eaton), N. Y. 



7 A. PODOI-HYLLUM (or SIEBULDII). Fronds of two forms, thick, smooth, pinnate, with 



a few large oblong pimne, in the fertile contracted and covered wjth sori. China. 



8 A. Tlielypteris Sw. Lady Fern. Frond lance-ovate, 10 1& ; pn. narrow, distant, 



deeply pinnatifld, the lowest pair as long as any ; margins reflexed in fruit. 



9 A. Novaboracense Willd. Xew York Fern. Frond elliptic-lanceolate, 1218'; 



pn. narrow, gradually shortening from the middle both ways ; begin, oblong, obtuse, 

 flat; sori close to the margin, at length confluent. Moist woods : com. Delicate. 



10 A. patens Sw. Frond soft and thin, downy with rusty hairs, lance., 1218' : pn. 

 linear-oblong, pinnatifld; segm. oblong, obtuse, entire; sori scattered. Dry, Fla. 



1 1 A. MOULK. from S. Afr. and S. Am., in divided just like A. patens, and equally hairy, 

 but is larger, finer, with straw-colored stipes, and the sori in regular marginal rows. 



12 A. cristatum Sw. Frond narrowly lanceolate, some 2fx6'; pn. deeply pinna- 

 tifid, triangular-oblong or -ovate, acute ; segm. toothed, bearing a single row of large 

 sori each side of the mid-vein. A beautiful dark-green Fern, common in woods. 



13 A. Goldlaiinin Hook. Frond oval or ovate, about ]5xlO', stipe same length ; 

 I"a. broad (H 2'), deeply pinnatifid ; segm. subfalcate, creuate. Woods, E. and \V. 



14 A. fragraiis Sw. Fronds linear-laneolate, 6 12', tapering both ways, bipinnate ; 

 stipe short, chaffy ; pn. ovate-oblong, 110" ; segm. lin. -oblong, with a dozen round- 

 ish crenatures or lobes ; sori confluent. Rocks, Northern Mich, and Wis. 



ISA. margiimle Sw. Fern ovate to lance-orate, thick, glabrous, 1 2f, bipinnate , 

 stipe very chaffy at base ; pn. lanceolate ; segm. oblong-falcate, obtuse and entire at 

 apex, the lower crenate-lobed ; sori round, at or near the margin. Rocky woods. 



16 A. Fillx-mas. Fern lanceolate,! 3f; stipe very chaffy; pn. triangular-lance.; 

 segm. oblong, obtuse, serrate at apex ; sori near the mid-vein. N. J. to Va. ? N. \V. 



17 A. spiitulosum Willd. Stipe elongated, soon smooth, the chaff deciduous ; frond 

 1 2f, ovate, acuminate, nearly or quite tripinnate; pinnae lanceolate, acuminate, the 

 lower longest ; pul. oldong, acutish, segm. mucronate-eerrate. Woods and pastures. 



0. dilatatnw. Stipe permanently chaffy ; frond triangular-ovate ; pnl. obtuse 

 v Uootlii. Stipe chaffy; frond oblong-lanceolate ; pnl. rather acute. 



