205 
Differs from P. Hookeri, for which it is liable to be mistaken, by 
its smaller size, flaring mouth and single annulus; from P. tur- 
dinatum also in the smaller size and narrow-bordered mouth ; from 
both in its larger spores. 
PHYSCOMITRIUM DRrUMMONDII, n. sp. 
(Plate 201.) 
Physcomitrium acuminatum L. and J. Man. 198 (1884) in part? 
P. Hookeri var. serratum Ren. & Cardot, Rev. Bryol. 19: 93(1892). 
Plants gregarious or scattered, 3-10 mm. high; stems with 
short basal branches; leaves narrow, strictly erect, lanceolate-acum- 
inate, 2-3 mm. long, serrate above the middle, marginal cells 
longer and broader, inflated or yellow, basal cells lax ; vein thick, 
ending below the apex or excurrent into a cuspidate point; seta 
Stout, straw-colored or brown when old, short, only 3-5 mm. long, 
frect slightly twisted; capsules I mm. long, pyriform turbinate, 
not contracted below the flaring mouth when dry, bordered by 
8 rows of narrow elongated, thick brown cells, very distinct 
from the cells, with sinuous walls of the rest of the capsule; an- 
nulus narrow, orange-colored, persistent, with a second incurved — 
hyaline row; lid conic-rostrate, bordered by orange, beak as 
long as the spore-sac, which is shallow and broad; neck contracted 
below the spore-sac, stomatose; calyptra large, 2-3 mm. long; 
‘pores large, .o40-.045 mm., warty, maturing April. 
Type specimens collected by Drummond near New Orleans, 
and distributed:as No. 24 of his Southern mosses in 1848 as P. 
Pyriforme, var. 3. Also collected by A.B. Langlois, at Pointe a la 
Hache “ on ground along roadsides 1886,” and distributed as No. 
44 of Ren & Cardot’s, Musci Am. Sept. Exsic. Recently collected 
by B. F, Bush, at Campbell, Missouri, and ranging northward into — 
Canada, Belleville, Macoun, west to Oregon, Henderson. The 
Specimens sent to me from the Department of Agriculture, collected 
by Jermy in Texas, and referred to P. acuminatum, with some 
doubt, are also this species, differing from P. acuminatum in its 
Smaller size, strict, erect habit, stout seta, narrow bordered mouth, 
Fostrate lid and larger spores, which are warty not spinose, and x 
double the size of any American specimens of P. acuminatum, — 
which I have seen. We suspect Wright's Texan specimens cited 
in the Manual also belong here, though we have not seen’ them, S. 
but the Spores are described as “large.” Hall's. Illinois speci-_ me 
+) PONS are probably P. acuminatum. 4 2 
