264 BOTANICAL GAZETTE [ocToBER 
costa being somewhat longer, the marginal row in the middle 
of the leaf rhomboidal with the marginal wall regularly thicker 
than (often twice as thick as) other walls of the same cell or the 
walls of other cells of the middle lamina, the latter oval to linear 
hexagonal, 6.54 wide by 47.6 long, varying in width from 4.7 
to 8.6m and in length from 38 to 64.5, at the apex of the leat 
cells shorter and broader, sometimes irregular, 7.9@ wide by 
20.8 long, ranging from 5 to 8.6m wide and from 15 to 30# 
long; perichetial leaves oblong lanceolate, abruptly acuminate, 
acumen one-fifth the length of the body, serrulate in the upper 
third, entire below, costate, costa narrow, percurrent or excur- 
Fert. 
Sporophyte small or medium, I to 3™ long: seta slender, 130 to 
1604 in diameter, brown or purplish brown throughout, or paler 
above; central strand small, 17 to 22m in diameter, of six to 
eight rows of cells, cortex of one or two layers of cells 4 to 
I1# in diameter, beneath these the cells of the ground tissue 
abruptly larger, 15 to 30 uw: capsule 1.5 to 3™™" long, symmetric 
or asymmetric, erect or inclined, chestnut brown to brownish 
purple, constricted under the broad and slightly dilated mouth 
when dry; exothecium cells parenchymatous, generally regular, 
quadrate to short rectangular, walls very thick, 5 to 9#, cells 21P | 
wide by 31.5 long, varying in width from II to 344 and in 
length from 21 to 604, four to six rows of hexagonal transversely 
elongated cells under the peristome 24 wide by 14.34 long ; 
stomata twelve to thirty to the capsule, 30@ wide by 38.5# long; 
collum prominent, long, one-half the length of the sporangium ; 
teeth of peristome lanceolate to linear lanceolate, yellow below, 
paler and narrowly margined above, densely and finely papillose 
on the back above, transversely striate in the lower half or occa- 
sional areas in lower half covered with papille arranged in trans- 
verse rows ; endostome pale yellow, finely papillose, shorter than 
the teeth, membrane equaling the segments or nearly so, e 
latter lanceolate, carinate, open along the keel between the artic- 
ulations, not gaping; cilia one or two, short and broad or obso- 
lete; operculum high conic or apiculate from a convex base, 
