563 
cm. each way, pentagonal; lower pinnw much the largest, with their basal segments 
on the lower side enlarged and again pinnatifid.—-On rocks, House Mountain, Llano 
County (Reverchon), Limpia Canon, Presidio County (Nealley). 
* * Fronds deltoid-ovate, nearly bipinnate, the lower segments of the first pair of pinne 
enlarged. 
5. N. candida (Mart. & Gale.) Hook. Rootstock slender, scaly: stipes 5 to 20 cm. 
long, with a few large scarious-margined brown scales which are soon deciduous, 
black, wiry: fronds 8 to 20 em. long, 5 to 8 em. wide, bright green above, chalky- 
white beneath, nearly bipinnate with narrow linear-oblong segments, margins 
slightly revolute.—Cation of the Sabinal, Uvalde County (Reverchon), Cedar Moun- 
tain, Gillespie County (Jermy), Uvalde Cation (Mrs. Young). 
* * * Fronds lanceolate or linear-oblong, bipinnate or tripinnatifid, 
6. N. Grayi Dav. Rootstock short: stipes cespitose, 3 to 10 em. long, light 
brown, clothed with slender somewhat deciduous scales: fronds 6 to 18 em. long, 2 
to 4 cm. wide, with broadly triangular pinnw; under surface with copious waxy 
powder with scattered pale-brown scales: sori brown.—Limpia Cation, Presidio 
County (Nealley). 
7. N. Schaffneri (Fourn.) Underw. Rootsteck short, clothed with black slightly 
pectinate scales: stipes 3 to 5 em. long, dark brown or black, clothed with dark 
reddish-brown bristly scales and hairs: fronds 10 to 15 em, loug, 2 to 3. cm. wide, with 
lanceolate-ovate pinne; under surface with copious waxy powder with scattered 
red-brown scales: sori dark brown to black. (N. Nealleyi Seaton, Contr. U. 8S. Nat. 
Herb. i, 61. Aleuritopteris Schaffneri Fourn,)—Chenate Mountains, Presidio County 
(Nealley). 
* * * * Fronds deltoid-ovate, tri-quadripinnate at base. 
8. N. nivea Desv., var. DEALBATA (Pursh) Dav. Rootstock short, with copious 
rusty, lanceolate scales: stipes 2 to 12 em. long, wiry, dark reddish-brown, smooth: 
fronds 5 to 12 em. long, 3 to 8 cm. wide, gradually less pinnate above; ultimate seg- 
ments numerous, oval or oblong, the terminal ones larger, (N. dealbata (Pursh) 
Kunze.)—On rocks, Meridian, Bosque County (Hasbrouck), San Saba (Reverchen), 
and doubtless distributed throughout the western portion of the State. 
4. ADIANTUM L. (MAIDENHAIR.) | 
Sori marginal, attached to the under side of a retlexed portion of the 
frond which is more or less altered in texture.—Smooth ferns of medium 
size with polished black stipes and rachises. 
1. A. Capillus-veneris L. Rootstock creeping: stipes 6 to 25 em. long: fronds 
ovate-lanceolate in outline, bipinnate or the upper third simply pinnate, with 
smooth pinnules which are rhomboid or wedge-obovate, 8 to 15 mm. each way, 
margins incised except when recurved to form the lunulate indusia.—Along streams, 
Austin (Hall), San Antonio (Mrs. Young), Crab Apple, Gillespie County (Jermy), and 
probably more or less frequent in moist places throughout, 
2. A. trichoiepis Fee. Rootstock short, stout, scaly: stipes 7 to 15 em. long, 
black: fronds tripinnate, oval in outline, with numerous small pinnules which are 
roundish-rhombic, barely crenate, and pubescent on both sides: indusia 2 to 4 on 
each pinnule, velvety.—Pecos River (Bigelow), but not collected recently. 
5. PTERIS L. (Brakr.) 
Sori marginal, continuous, attached to a slender filiform receptacle 
which connects the apices of free veins: indusium membranous formed 
of the reflexed margin of the frond.—Coarse ferns of woods and thickets. 
