384 CRYPTOGAMIA.— FILICES. 



598. SCOLOPENDRIUM. Hart's-tongue. 



S. vulgare: frond ligulate, entire, cordate at the base. 

 HAB. Limestone rocks. Frond 8 — 10 in. long, 

 rachis acute, petiolate ; sori very large* 



599. WOODWARDIA. 



1. W . onocleoides ; sterile frond pinnatifid ; segments 



lanceolate, repand, slightly serrulate ; fertile 

 fronds pinnate ; segments linear, entire, acute. 

 HAB. Swamps. About lft. high ; fert.fr ond witli 

 very narrow seg. ; sori large, oblong. 



2. W.virginica: frond very smooth, pinnate; divi- 



sions sessile, lanceolate, pinnatifid ; segments ob- 

 long, obtuse, nearly entire ; stipe smooth, nearly 

 terete. 

 HAB. Swamps. About 2 ft. high ; frond oblong, 

 sori small, at length subconfluent. 



600. PTERIS. Brake. 



t . P. Aquilina : frond tripartite ; divisions bipinnate ; 

 segments oblong-lanceolate, the lower ones pin- 

 natifid, upper ones entire. 

 HAB. Woods. Two— four ft. high ; stipe long, 

 erect, smooth ; frond ample, circumf. triang. 



1. P. atropurpurea : frond pinnate ; inferior divisions 

 ternate or pinnate ; segments lanceolate, obtuse, 

 obliquely truncate or subcordate at the base. 

 HAB. Rocks. A span high ; frond grayish green; 

 fructif conspicuous ; stipe dark 6r., subpubes. 



:3. P. caudata: frond pinnately 3-parted ; sterile divi 

 sions bipinnate, with the segments linear, long, ob- 

 tuse, and very entire ; fertile divisions pinnate : 

 segments rather remote, the lower ones pinnatifid- 

 dentate at the base. 

 HAB. Stony woods near creeks. A small species ; 

 stipe black and shining. 



601. ADIANTUM. Maiden-hair. 



K. pedatum : frond pedate ; divisions pedate ; segments 

 rhomboid-oblong, sublunate, incisely lobed, 



