256 BOTANICAL GAZETTE [ocTOBER 
thin, occasionally simple, usually branched near the base or 
double. 
Sporophyte small 0.5 to 1.5% long: seta purplish below, 
pale above, 140 to 18m in diameter ; central strand well differen- 
tiated, large, 35 to 58min diameter, composed of thirty-five to fifty 
rows of cells; cortex of two to three layers of cells 4.3 to 10.7¢ 
in diameter, walls very strongly thickened, as are those of the 
ground tissue, the latter cells 12 to 17# in diameter: capsule 
oblong to obovate, incurved from an erect base, asymmetric, 
gradually contracted to the seta, brownish purple throughout 
or paler on the concave side, usually more or less constricted 
under the mouth and the latter dilated in drying, 1.5 to 2™ 
long, wall thin; cells of exothecium parenchymatous on the 
concave side, 25.7“ wide by 38.6u long, ranging in width from 
17 to 28m and in length from 21 to 64m, on the convex side 
more or less prosenchymatous, 20m wide by 62» long, ranging 
from 13 to 21.54 wide and from 34 to 79u long; walls of cells 
from 2 to 4, thicker on the concave side, three to six rows of 
isodiametric, hexagonal cells under the peristome 13 to 22; 
stomata few, eight to fourteen to the capsule, 25 wide by 36# 
long; perist teeth linear-lanceolate, very slender pointed, trans- 
versely striate on the back below the middle, densely papillose 
above, hyaline border very narrow or none below, wider and ser- 
rate above, teeth yellow; endostome almost equaling the teeth, 
finely papillose in all parts, membrane narrow, one half the length 
of the segments, the latter lance-linear, perfect, entire, often not 
split along the keel, never gaping; cilia one or two, slender, nod- 
ulose, nearly equaling the segments; operculum equaling cap- 
sule in width, convex to high conic, obliquely apiculate or rostel- 
late; annulus broad, of two to three rows of cells: spores 
light brown, surface minutely roughened, 8 to 12m in diameter: 
calyptra equaling the capsule, split half its length. 
Has. : On shaded rocks, occasionally at base of trees. TYPe 
locality Lancaster, Pennsylvania. 
Japan, North America: New Brunswick, Ontario, region 
of the Rocky mountains, New England, New York, District of 
