Eur. not uncommon. Sweden, Germany, Switzerl.! Amer. »Mi- 
quelon isl.»: Cardot. 
B. Pedicel of capsule rough. Costa of leaves simple. 
13.H.megaptilum  Sullivant, —  Camptothecium Sull. icon. 
musc.; Hylocomium Kindb. 
Stem pale, branches thick not distinetly turgid. Leaves pli- 
cate shining not decurrent, green or finally yellowish, larger 
than in the last; costa dentate at back vanishing near or above 
middle. Stem-leaves entire broadly ovate-oblong abruptly nar- 
rowed to a somewhat long subulate filiform-pointed acumen; 
alar cells few small suboval, the others linear. Branch-leaves 
denticulate above middle, serrate in upper part, gen. ovate- 
oblong, obtusate with short broad subacute point; apical cells 
 lanceolate-oblong, the others linear exc. the alar. Perichetial 
leaves long-subulate. Capsule large oval-oblong or arcuate; 
teeth yellow; segments entire; cilia long appendiculate; pedicel 
often long. Often pseudo-monoecious. — On ground in woods 
r Amer. U. S. princ. in Pacif. distr: Hall and Howell, com. 
Macoun; Leiberg, com. Mrs Britton. 
39. Girgensohnia (Lindberg, as subgenus) Kindb. 
1.G.ruthenica Weinmann. — Hypnum Weinm.; Climacium 
Lindb.; Sulliv. icon. m. 
Lower stem-leaves squamiform hyaline entire. Other stem- 
leaves broad round-ovate obtuse short-pointed; branch-leaves 
broadly ovate-lanceolate subobtuse long-decurrent, denticulate 
below middle, sharply serrate above; upper cells lanceolate- 
oblong, lower inner sublinear; costa dentate at back not per- 
current. Capsule oblong-cylindric; lid conic acute or apiculate; 
pedicel not long. — Amer. r. Alaska: J. M. Macoun. 
40. Thamnium Bryol. eur. 
À. Leaves sharply serrate above, gen. large; costa dentate 
above or smooth, not percurrent. v 
a. Stem-leaves broad subovate. Lid of capsule rostrate; cilia 
of endostome long appendiculate. 
1.T.alopecurum L. — Hypnum L.; Thamnium Br. eur. 
Branches more or less compressed sometimes flagelliferous. 
Middle stem-leaves ovate subobtuse or acute not fimbriate; 
branch-leaves narrow- oblong acuminate acute; middle cells oval- 
oblong, inner basal sublinear; costa dentate subpercurrent. Cap- 
sule suboblong; pedicel nearly straight us. prolonged. Dioe- 
“lous not often fruiting. — Shaded often damp rocks. Hur. 
hot r. Sweden, Switzerl.! 
