590 - FILICES.  (FERNS.) 
stalked ; pinnules sessile, oblong or linear-oblong, truncate or subcordate at the 
base, obtuse or rarely somewhat mucronate; indusium formed of the reflexed 
and little-changed margin, at length pushed back and showing a broad marginal 
band of ripened sporangia. (Pteris atropurpurea, L. Allosorus, Kunze, Gray.) 
— Mountains of Alabama and northward, mostly on lime-rock. Frond 9'- 
12’ high. Stipe and rachis black and shining, smooth or somewhat rusty- 
pubescent. 
6. CHEILANTHES, Swartz. 
Fruit-dots at the thickened ends of the veins, distinct or at length confluent, 
covered by the continuous or interrupted reflexed margin of the lobes. Veins 
free. Fronds 1 -3-pinnate; pinnules with a midrib, often hairy or woolly. 
1. C. Alabamensis, Kunze, Fronds broadly lanceolate, subcoriaceous, 
pinnate ; pinnæ ovate-lanceolate, deeply pinnatifid, or the lower ones again pin- 
nate; pinnules ovate-oblong, rather obtuse, often auriculate at the upper side of 
the base, glabrous, the margin reflexed and forming a mostly continuous mem- 
branaceous involucre. (Pteris Alabamensis, Buckley.) — Limestone cliffs on the 
Tennessee and French Broad Rivers, Alabama, &c., Buckley. — Fronds 4'- 6! 
long, on slender black and polished stipes 9'—4' long, pulverulent along the 
upper side, and somewhat chaffy at the base. i 
2. C. vestita, Swartz. Fronds broadly lanceolate, like the stalks hirsute 
with rusty hairs, bipinnate; pinnæ triangular-ovate ; pinnules oblong, obtuse, 
more or less incised ; the ends of the lobes reflexed to form separate herbaceous 
involueres. — Near Augusta, Georgia, Kunze, and northward. — Fronds 4'- 8' 
long, becoming smooth above. 
3. C. tomentosa, Link. Fronds broadly lanceolate, tripinnate, above 
clothed with white deciduous hairs, beneath densely tomentose with brownish- 
white wool; primary pinne ovate-oblong ; ultimate segments minute, round- 
obovate, bislo or adnate-decurrent, the margin reflexed forming a continuous 
somewhat membranaceous involucre. (C. Bradburii, Hook., at least as to Lind- 
heimer's plant.) — French Broad River, North Carolina and Tennessee, and 
southwestward.— Frond 6/-12! long. Stipe and rachis whitish with long 
paleaceous hairs. 
7. ADIANTUM, L. Marennare. 
B orbicular or transversely elongated, formed of a reflexed and altered 
portion of the margin of the frond, bearing the sporangia on its under side at 
the ends of the veins. Midrib none or eccentric: veins forking, mostly free. 
Stipe and rachis commonly black and shining. ; 
jte A. pedatum, L. “Stipe long and slender, forked, the spreading mee 
recurved ` T bearing: on the outer side several slender horizontal pinnate 
nnules numerous, alternate, shortstalked, oblong, entire on he 
margin cleft and fruit-bearing. — Shady rood, 
| asain Than; ceful of all our 
