116 
All figures except I and 2 highly magnified. 
Figs. 11, 12, 13 and 14 treated with hot dilute nitric acid to show true forms of 
cells. 
Two New American Mosses. 
By G. N. BEsT. 
BuxBAUMIA PIPERI, n. sp. Dioicous; stemless; leaves reduced to 
yellowish ovate-oblong or palmate, crenate-laciniate bracts; 
areolation oblong-hexagonal; bracts of fertile plants pro- 
ducing long rhizoids, enveloping the fleshy vaginale in a felt- 
like mass. Seta about I cm., arcuate or flexuose, warty, ob- 
liquely inserted. Capsule inclined, ovate-oblong, unsymmetric, 
greenish becoming pale yellow; section broadly elliptical ; 
upper surface not deeply impressed nor strongly margined ; 
neck distinct; cuticle thin, not glossy or but slightly so, rolling 
back in segments after the loosening of the broadly conical, 
obtuse operculum. Columella adherent. The membran- 
aceous endostome composed of linear, papillose, hyaline, 
fluted segments, lightly cohering by their thickened margins, 
-forming a truncated cone. Peristome of a single layer, with 
rudiments of a second deeply inserted; teeth linear, reddish or 
dirty white, papillose, articulated, revolute, lightly connate, 
fitting into the endostomial grooves, as long or nearly so as. 
the segments. Pseudannulus usually of 3 layers, the inner 
showing traces of teeth more or less distinct. Spores of me- 
dium size. 
Hab. On rotten wood, or on ground covered with woody 
oes in mountainous regions, probably not rare in the North 
and West, but either overlooked or when found referred to B. 
aphylla or B. wndustata. Mason Co. Wash., Mr. C. V. Piper. 
Kootenai Co. Idaho, Mr. ]. B. Leibérg. Barisan XVii. 126; 
XVili. 49. 
Remarks: B. Pipert is intermediate between B. aphylla and B. 
indusiata. The shorter and more curved pedicel, the more erect 
capsule not markedly depressed nor strongly margined, peristome 
of a single well developed layer, spores larger, readily separate it 
from the former. The more symmetrical capsule, peristome of 4 
layers, the outer successively shorter, of B. ixdusiata mark it as 
distinct from the latter. In 2. aphylla the operculum is usually 
thimble-shaped, the peristome rudimentary. 
Not a little practice is required to manipulate the peristomes 
and endostomes of these peculiarly interesting plants with satis- 
