670 FILICES. 



CHEILANTHES, Sirarte. 



C. microphylla, Swartz. Stipe dark brown, from a short rootstock, 

 smoothish ; frond smooth, broadly lanceolate, 2-3 pinnatifid, 3'-9' long; 

 pinnae lanceolate from a broader base ; pinnules linear-oblong, obtuse, entire, 

 or the lower ones pinnatifid ; involucre pale, narrow. — Islands near the 

 mouth of the St. John's (Curtiss). — Frond 1° or less long. 



ADIANTUM, L. 



A. tenerum, Swartz. Frond deltoid, 3-4-pinnate; pinnules stalked, 

 obliquely rhombic, the wedge-shaped base and lower edge entire, the upper 

 edge broadly and shortly lobed, bearing the transverse sori at their tips. — 

 East Florida (Feay, fyc). — Fern l°-3° high, the black stipe and rachis 

 smooth and glossy. 



SCOLOPENDRIUM, L. 



Sori as in Asplenium, but the involucres arranged in pairs, and opening 

 towards each other. 



S. vulgare, Smith. Stipe smoothish, 2' - 3' long from a thick rootstock ; 

 frond lanceolate-oblong, acute, slightly serrulate, cordate at the base, 6 , -9 / 

 long, the upper half fruit-bearing. — Shaded rocks, Tennessee, and north- 

 ward. 



A. Bradleyi, Eaton. Frond thin, pinnate below, pinnatifid above, lanceo- 

 late-oblong, barely acute, 3' -7' long; pinnae short-stalked, oblong-ovate, the 

 lowest ones lobed or pinnatifid. — East Tennessee (Eaton). — Rootstock 

 short. Stipe smooth, black. 



A. ebenoides, R. R- Scott. Frond thin, broadly lanceolate, pinnate 

 below, pinnatifid above, long-attenuate and often rooting at the apex, 4' -9' 

 long; pinnae lanceolate from a broader base, 3" -9" long. — Shady ravines. 

 Central Alabama, and northward. Rare. 



A. parvulum, Mart. & Galeotti. Frond rigid, lanceolate, pinnate, 2' -8' 

 long; pinnae nearly opposite and sessile, oblong, entire or crenulate, auricled 

 on one or both sides at the base, 2" -6" long; sori half-way between the 

 margins and midrib. — Calcareous rocks, Florida to Tennessee. 



A. cicutarium, Swartz. Tufted from a short rootstock, 3'- 12' high, 

 smooth ; stipe blackish ; frond thin, ovate or oblong, pinnate or nearly bipin- 

 nate ; pinna 1 lanceolate, obtuse ; pinnules oblique, entire on the lower edge, 

 toothed on the upper, with the teeth 2-3-eleft ; sori in two rows. — Sumpter 

 County, s. Florida ( C. F. Adanu). 



A. firmum, Kunze. Bootstocks short ; frond ovate or oblong, pinnate, 

 rather longer than the pale smooth stipe, 12' or less long; pinna; (about 12) 

 lanceolate or oblong, obtuse, serrate, the terminal one attenuate; sori in two 

 rows. — Marion County, Florida (./. D. Smith). 



