POLYPODIACEAE. 



ii. Asplenium Bradley! D. C. Eaton. Brad- 

 ley's Spleenwort. (Fig. 56.) 



Asplenium Bradley i D. C. Eaton, Bull. Torr. Club, 4 : n. 



i873- 



Rootstock short, chaffy with brown scales. Stipes 

 tufted, slender, 2'-3'long, chestnut-brown throughout ; 

 leaves oblong-lanceolate or oblong, acuminate at the 

 apex, not narrowed at the base, pinnate with 8-12 

 pairs of short-stalked or sessile, oblong-ovate pinnae, 

 the lower again pinnatifid or pinnate with oblong 

 obtuse lobes or pinnules, which are toothed at the 

 apex, the upper pinnatifid with dentate or nearly 

 entire lobes ; rachis brown ; sori short, borne near the 

 midrib, covered with the narrow indusium until ma- 

 turity. 



On rocks, 'preferring limestone. New York to Georgia 

 and Alabama, west to Arkansas. Local. July-Sept. 



12. Asplenium acrostichoides S\v. Silvery 

 Spleenwort. (Fig. 57.) 



Asplenium acrostichoides Sw. Schrad. Journ. Bot. 2 : 54. 



1 800. 

 Asplenium thelypteroides Michx. Fl. Bor. Am. 2 : 265. 



1803. 



Rootstock slender, sinuous, creeping. Stipes S'-ia' 

 long, straw-colored, somewhat chaffy below at least 

 when young ; leaves lanceolate in outline, i-3 long, 

 6'-i2 / wide, acute or acuminate at the apex, narrowed 

 to the base, pinnate-pinnatifid ; pinnae linear-lanceo- 

 late, sessile, acuminate, deeply pinnatifid into numer- 

 ous oblong obtuse or subacute, slightly crenate seg- 

 ments ; sori crowded, slightly curved or straight, the 

 lower ones often double ; indusium light-colored and 

 somewhat shining when young. 



In rich moist woods. Nova Scotia to Minnesota, south 

 to Alabama and Kentucky. Ascends to 5000 ft. in Virginia. 

 Also in eastern Asia. Aug. -Oct. 



13. Asplenium Filix-foemina (I,.) Bernh. Lady-fern. (Fig. 58.) 



Poly podium Fili.v-foemina L. Sp. PI. 1090. : 

 Asplenium Fili.i-focmina Bernh. Schrad. Xeues 

 Journ. Bot. i: Part 2, 26. 1806. 



Rootstock creeping, rather slender for the size of 

 the plant. Stipes tufted, 6'-io / long, straw-colored, 

 brownish or reddish ; leaves broadly oblong-ovate 

 or oblong-lanceolate, acuminate at the apex, i-3 

 long, 2-pinnate ; pinnae lanceolate, acumiuate, 

 short-stalked or the upper ones sesbfle, 4/-S' long; 

 pinnules oblong-lanceolate, incised or serrate, their 

 lobes or teeth often again toothed, those toward 

 the ends of the pinnae confluent by a v e ry narrow 

 margin to the secondary rachis ; sori short, the 

 indusia straight or variously curved, sometimes 

 horseshoe-shaped. 



In woods, thickets, and by walls and f ence. Nova 

 Scotia to Alaska, south to Florida, Louisi; llia ar id Ari- 

 zona, thus throughput nearly all of North America. 

 Ascends to 6000 ft. inNorth Carolina, and \ o 3000 ft. in 

 Vermont. Also in Europe and Asia. Jui ie-Aug. 



