262 BOTANICAL GAZETTE | OCTOBER 
under the peristome smaller, hexagonal or tranversely elongated, 
from 13 to 26m long and from 18 to 36m wide; stomata twenty- 
five to thirty-five to the capsule, scattered, 4ou wide by 5op 
long; teeth of peristome lanceolate, pale yellow, long acuminate, 
margined, margin narrow at base becoming gradually wider above, 
reaching its greatest width about the middle, teeth serrulate 
above, transversely striate to the middle, here the striz becoming 
irregular, some being oblique and some perpendicular, farther up 
the striz replaced by papilla which are scattered irregularly 
or arranged in parallel rows; endostome equaling the teeth or 
a little shorter, membrane one-half to three-fifths the length of 
the segments, the latter lanceolate, very slender pointed, perfect, 
carinate, open along the keel between the articulations but not 
gaping, membrane and segments finely and densely papillose as 
are the one to three stout cilia, the latter shorter than the seg- 
ments; operculum convex to conic, apiculate; annulus of two 
rows of cells: spores light brown, finely punctulate, 15 to 184 
in diameter: calyptra two-thirds the length of the capsule, split 
half its length, 
Has.: Onmoist stones or earth. Type locality lower Austria. 
Europe, Asia, North America: District of Columbia, Onta- 
rio, Wisconsin, Montana, Idaho, and British Columbia. Not 
common. 
This species is very closely related to A. serfens by all its characters and 
small forms of it are difficult to distinguish from the latter. It is commonly 
of larger size throughout and has its leaf cells at base more > commonly sei 
riparium floridanum, it may be found troublesome to separate it. 
leaves of forms of A. rifarium are entire, while those of A. juratzkanum are 
serrulate to the base. 
AMBLYSTEGIUM ComPactuM (C. Muell.) Aust. Pl. XZ. fig. 8. 
Synon.: Hyfnum compactum C. Mueller, Syn. Musc. Frond 2: 408. 185!- 
—Sullivant, Icon. Musc. 201. f/. 123. 1864.— Lesquereux & James, Man- 
Moss. N. Amer. 375. 1884. 
Amblystegium serratum Bruch & Schimper, Bry. Eur. Ambly. II. 1853- 
