216 WILLIAMS: THE GENUS DESMATODON 
TYPE LocALity: Norway. 
DistRIBUTION: Greenland and Newfoundland to the Canadian 
Rocky Mountains and at the foot of Mount Dana, California; 
also in Europe. 
ILLUSTRATION: B.S.G. Bryol. Eur. pl. 131. 
8. DEsMATODON GARBERI Lesq. & James, Man. 112. 1884 
Hyophila fragilis Card. Rev. Bryol. 36: 75. 1909. 
Dioicous, the male plants very slender, with a rosette-like 
apical flower, the outer perigonial leaves scarcely differentiated, 
the inner shorter, ovate-acute, entire, costate, enclosing ten to 
fifteen antheridia about 0.3 mm. long, with filiform, somewhat 
longer paraphyses: fertile plants in compact cushions with slender, 
erect, mostly unbranched stems 5-6 mm. high and about 0.2 mm. 
in diameter with distinct central strand and few or no radicles 
above the base; stem leaves rather distant, incurved or somewhat 
crispate and subtubulose when dry, the upper I-1.5 mm. long, ob- 
long-lanceolate, acute, with margins incurved and entire or occa- 
sionally with a few small teeth near the apex, flat and entire be- 
low; costa stout, sometimes rough on the back in the upper part, 
percurrent, in cross-section showing two to four guide-cells with 
one or two rows of smaller cells on the ventral side and on the dor- 
sal side a large stereid band with outer cells scarcely differentiated ; 
cells of leaf distinct, more or less golden brown from apex to base 
of leaf, those of upper part highly mamillose on the ventral side, 
mostly nearly flat on the dorsal side, the median cells roundish, 
about 8 uw in diameter, the basal smooth and rather short-rectangu- 
lar; perichaetial leaves scarcely differentiated or sometimes one 
or two very small inner leaves; seta erect, 5 mm. long; capsule 
somewhat fusiform, its greatest diameter a little below the middle, 
I~1.3 mm. long without lid, the stomata in one row near the base; 
annulus of one or two rows of cells; teeth of peristome reddish 
brown, papillose, irregular, divided often nearly to base into two © 
slender forks, from a papillose basilar membrane scarcely extend- 
ing above the rim of capsule; lid nearly erect, conical, short- 
beaked, about one third the length of the capsule, the cells elon- - 
gate in nearly erect rows; spores smooth, 6-8 yu in diameter, calyp- 
tra cucullate, extending well down the capsule, sometimes split 
upward to near the smooth apex. [Fic. 8.] 4 
Type LocaLity: Key West, Florida. 2g 
DistRIBUTION: New Providence, Bahama Islands; Key West, 
Florida; and Yucatan, Mexico. > 
