626 riLicKS. (ferns.) 



•T- P. serrulata, L. f. Frond Mpiiin.itifiil ; j)innaj 12 or more, in opptv 

 siti- pairs, (lotiuiviit, tlic Idwct linear, piiinatifid; otlicrwise nearly as tin- last. 



— South Carolinri ami Alaliania. 



•5. P. aquilina, L. (Bkakk.) Fronds large, glabrous or somewhat 

 hairy hcneatli, hroadly triangular, tri|)innato ; jiinnules oidoiig or linear, 

 entire or hastate or ])innately jjarted ; ultiinato segments ol)tuse, oldong or 

 linear, the terminal ones often elongated, the margin rellexed or revidute; 

 veins simjde or fork(^d ; indusium narrow, ciliated. — Common everywiiere. 



— Stipe stout, 6' -2^ higli. Frond l°-2'' h)ng. 



Var. caudata (P. caudata, L.), witli very narrow segments, the torndnal 

 ones elongnted, and both surfaces of the frond glabrous or even glaucous, 

 occurs iu South Florida and along the (iulf coast. 



6. PELLJEA, Link. 



Fruit-dots oblong or linear at the ends of the veins, confluent in a broad 

 marginal line of fructification. Indusium as in Pteris. Veins free, forked or 

 pinnate. Fronds mostly 1 -3-pinnate, smooth, mostly coriaceous. 



1. P. atropurpurea, Link. Fronds tufted, coriaceous, o\aredanceo- 

 late, piniuvte or lielow bipinnatc; idnna; o])j)osite, rather distant, the lower 

 ones stalked ; pinnules sessile, oblong or linear-oblong, truncate or subcordate 

 at the base, obtuse or rarely somewhat mucronatc ; indusium -formed of the 

 reflexed and little changed margin, at length pushed back and showing a 

 broad marginal baiul of ripened sporangia. — Mountains of Alabama, and 

 northward, mostly on lime-rocU. Frond 2'- 12' high. Stipe and rachis black 

 and shining, smooth or somewhat rusty ])ubescent. 



7. CHEILANTHES, Swartz. 



Fruit-dots at the thickcn(>d 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-])innate; pinnules with a midrib, often hairy or woolly. 



1. C. Alabamensis, Kunze. Fronds broadly lanceolate, subcoriaceous, 

 ]diinate ; piiuuc ovate-lanceolate, deeply pinuatifid, or the lower ones again 

 pinnate ; pinnules ovate-oldong, rather obtuse, often auriculate at the upper 

 side of the base, glabrous, the margin reflexed and forming a mostly continu- 

 ous membranaceous involucre. — Limestone cliffs on the Tennessee and French 

 Broad Rivers, Alabama, etc., Bncl-lci/. — Froiuls 4' -6' long, on .slender black 

 and polished stij)es 2' -4' long, pulverulent along the ujiper side, and some- 

 what chaffy at the base. 



2. C. vestita, Swartz. Fronds ])roadly lanceolate, like the stalks hirsute 

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

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

 ceous involucres. — Near Augusta, Georgia {7\liuize), and northward. — Fronds 

 4' — 8' long, becoming smooth above. 



3. C. tomentosa, Link. Fronds broadly lanceolate, tripinnate, above 

 clothed with white deciduous hairs, beneath denseh' tomentose with brownish 

 white wool; primary pinna; ovate-oblong ; ultimate segments minute, round- 



