590 Kir.ICES, (iF.RNS.) 



stulkoil ; j)inniili's sessile, ohloii;; or liucaroliloii;;, truncate or suI)cor(late nt tlio 

 base, ul)tusc or rarely somewliat mucroiuitc ; indiisium formed of tlie ri'Hexcd 

 and little-ehatiKed mar<;;in, at length i)ushed baek and sliowin;^ a. broad marf^inal 

 l)and of ripened sporangia. (I'teris atropHrpiirea, L. AUosonis, Kuiizi', (Irny.) 

 — Mountains of Alal)ania and northward, mostly on lime-roek. Frond 2'- 

 12' high. Stipe and rachis blaek and shining, smooth or somewhat rusty- 

 pubcseent. 



6. CHEILANTHES, Swartz. 



Fruit-dots at the tliickcned ends of tlie veins, distinet or at length confluent, 

 covered by the continuous or interrupted reflexcd margin of the 1oIm;s. Veins 

 free. Fronds 1 -3-pinnatc ; pinnules with a midrib, often hairy or woolly. 



1. C. Alabamensis, Kunzc. Fronds broadly lanceolate, subcoriaccous, 

 pinnate ; piinuv; ovate-lanceolate, deeply pinnatifid, or the lower ones again pin- 

 nate; pinnules ovate-oblong, rather ol)tuse, often auriculate at the njiper side of 

 the base, glabrous, the margin reflexed and forming a mostly continuous mem- 

 branaceous involucre. (Pteris Alabamensis, Buckley.) — Limestone ditis on the 

 Tennessee and French Broad IJivers, Alabama, &e., Bucklfi/. — Fronds 4' -6' 

 long, on slender black and polished stipes 2' -4' long, pulverulent along tho 

 upper side, and somewhat ehaft'y at the base. 



2. C. vestita, Swartz. Fronds broadly lanceolate, like the stalks hirsute 

 with rustv hairs, bipinnate ; pinna; triangular-ovate ; pinnules oblong, obtuse, 

 more or less incised ; the ends of the lobes reflexed to form separate herbaceous 

 involucres. — Near Augusta, Georgia, Kuuze, 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 tonientose with brownish- 

 white wool ; primary pinnic ovatc-oi)long ; ultimate segments minute, round- 

 obovate, sessile or adnate-decurrcnt, 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 

 Fouthwestward — Frond 6' -12' long. Stipe and rachis whitish with long 

 paleaceous hairs. 



7. ADIANTUM, L. M.udexh.vir. 



Indusium 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. 



1. A. pedatura, L. Stipe long and slender, forked, the spreading and 

 recurved branches bearing on the outer side several slender horizontal pinnate 

 divisions; pinnules numerous, alternate, short stalked, oV)long, entire on the 

 lower side, the upper margin cleft and fruit-bearing. — Shady woods, North 

 Carolina, and northward.— Stipe 8'- 12' high. The most graceful of all our 

 Ferns. 



