565 
7. P. intermedia Mett. Rootstock long, slender, widely cresping: stipes. scat- 
tered, 1 to 1.5 dm. long, pinkish-stramineous, continued into nearly straight rachises: 
fronds 8 to 25 cm. long, 3 to 10 em. wide, simply pinnate to bipinnate; pinna 
commonly opposite, remote, the secondary rachises straight, often pubescent; pin- 
nules oval or cordate-ovate.—Limpia Cafion, Presidio County (Nealley). 
7. CHEILANTHES wz. 
Sori nearly terminal on the veins, at first small and roundish, at 
length confluent.—Mostly hairy or woolly rock-ferns of medium or smal] 
size. 
§ 1. Segments mostly flat, the indusia more or less confluent, usually extending over the 
apices of several veinlets, but not continuous around the segment.—EUCHEILANTHES, 
* Fronds lanceolate, with brown or black stipes. 
+ Pinne usually 5 or 6 pairs; segments and rachises smooth. 
1. C. Wrightii Hook. Rootstocks rather slender, creeping: stipes 3 to 8 cm. long, 
chestnut brown, slightly scaly at base: fronds 5 to 12 cm. long,2 to 4 em. wide, 
mostly tripinnatifid: indusium similar to the frond in texture.—Limpia Canon, 
Presidio County (Nealley), western Texas (Wright). 
+ + Pinne more numerous; segments and rachises more or less pubescent. 
2. C. Alabamensis (Buckley) Kunze. Rootstock creeping, clothed with slender 
brown scales: stipes 5 to 18 em. long, black, with scanty, rusty wool: fronds & to 
25 cm. long, 3 to6 cm. wide, narrowly lanceolate, and tapering to an acuminate 
apex, bipinnate; pinnie close, ovate-lanceolate, the lower usually slightly smaller 
than those above; pinnules mostly acute, often auriculate on the upper side at base: 
indusia pale, interrupted only by the incising of the pinnules.—Lower Rio Grande 
(Schott), mouth of the Pecos (Bigelow), Austin (Hall, Underwood), Squaw Creek and 
Enchanted Rock, Gillespie County (Jermy), and probably widely distributed. ‘This 
species closely resembles the next with which it has often been confounded in col- 
lections. 
3. C. microphylla Swz. Rootstock short, creeping: stipes dark brown, 5 to 
25 ecm. long, rusty pubescent on the upper side: fronds 1 to 2.5 dm. long, 5 to 
15 cm. wide, ovate-lanceolate, bi-quadripinnate; pinne more distant, deltoid-ovate 
to ovate-lanceolate, the lower often much larger than those above; pinnules rather 
blunt, incised on both sides or again pinnate: indusium similar to frond in texture, 
sub-continuous.—Uvalde Cation (Mrs. Young), Limpia Canon, Presidio County 
(Nealley). . 
** Fronds triangular-pentagonal, with stout straw-colored stipes. 
4. C. leucopoda Link. Rootstock very stout, chatty: stipes 1 to 2.5 cm. long, 
densely pubescent: fronds 5 to 16 cm. each way, quadripinnatifid at base, gradually 
simpler above; lower pinne much larger, with the pinnules on the lower side elon- 
gate, the segments and rachises everywhere glandular-pubescent.—Uvalde Cafion 
(Mrs. Young). 
§2, Ultimate segments minute, bead-like, with the indusium continuous all around the 
margin: fronds scaly or tomentose or both. PHYSAPTERIS Presl. 
* Fronds hairy or tomentose (not scaly) beneath. 
5. C. gracilis (Fee) Mett. Stipes densely cespitose, clothed at first with woolly 
hairs, at length almost smooth: fronds 5 to 10 cm, long, ovate-lanceolate, tripin- 
natifid or tripinnate, upper surface barely tomentose, the lower densely matted with 
whitish-brown woolly hairs: indusium narrow. (C. lanuginosa Nutt.)—Upper Hondo 
(Reverchon) ; reported also from the upper Rio Grande (New Mexico?). 
11874—No. 3 15 
