a2. BOTANY. 
Among rocks at high elevations on Lassen’s Peak, Mt. Shasta, and Pyramid Peak, and aot 
other high points in the Sierras of California, Brewer, Lemmon. Cascade Mts. of British Columbia, 
Dr. Lyall. A Fern growing in large and dense patches, and much resembling narrow, delicate forms of 
the Lady Fern, but with globose sori near the margin of the lobes ef the pinnx, and without special 
proper indusium, for the objects figured as indusia by Mettenius in his later work on Asplenium are too 
delicate and fugitive to deserve the name. A common species in Northern Europe, but there the plant 
has usually broader segments than are found in the American specimens. The Eastern species, P. poly- 
podioides and P. hexagonoptera, do not, to my —— occur in the Southwest or in the Pacific States. 
P. Dryopteris, however, has been collected in Oregon 
XIII. = Swartz. 
§1. DRYOPTERIS or NEPHRODIUM. 
Indusium round-reniform, or orbicular with a narrow sinus. 
* Texture thin-membranaceous, veins simple or once forked. 
Aspidium Nevadense, (n. sp.). 
Rootstock creeping, densely covered with the persistent bases of former 
stalks; fronds standing in a crown, thin-membranaceous, 14~3 feet high, 
lanceolate in outline, pinnate; pinnze linear-lanceolate from a broad base, 
deeply pinnatifid; the lower pairs distant and gradually reduced to mere 
auricles; lobes crowded, oblong, entire or sparingly toothed, slightly hairy 
on the veins beneath, and sprinkled with minute resinous particles; veins 
about seven pairs to a lobe, simple or forking; sori close to the margin; 
indusium minute, reniform, furnished with a few dark-colored marginal 
glands, and bearing several long straight jointed hairs on the upper surface. 
Moist and shady places along creeks. Butte Co., California (Mrs. Pulsifer Ames), and in similar 
places in Plumas Co., Mrs. R. M. Austin and Mrs. Ames. The first specimens received were referred 
to A. Noveboracense, to which species there is the closest resemblance in the size, shape, and texture of 
the fronds, but later and more complete specimens hava a rootstock of‘a es different character. The 
Central American A. conterminum is more like the present species in some of its characters, but that has 
much firmer fronds and an erect rootstock. Aspidium Neradense of Boissicr (a Spanish Fern) having been 
proved to be identical with A. rigidum, var. pallidum, there is no reason why the name should not be | 
taken for a Fern coming from the Sierra Nevada of Califurnia. 
Aspidium patens, Swartz. 
Rootstock rather stout, creeping, bearing several fronds at the growing 
end; fronds 1-3 feet high, moderately long-stalked, ovate-oblong in out- 
line, membranaceous, softly pubescent beneath, pinnate; pinne closely 
placed, linear-acuminate, 3-6 inches long, 5-7 lines wide, the lowest 
pair scarcely or not at all smaller, but somewhat deflexed, all pinnately 
incised three-fourths of the way to the midrib; segments very numerous, 
