— 280 — 
36.D.Heimii Hedwig. — Gymnostomum H.; Didymodon Kindb;; 
Pottia Fuernrohr. ; 81200. 
Leaves lanceolate or sublingulate, the upper long-acuminate 
acute, densely serrulate above, not spreading; costa us. not 
excurrent. Capsule short subcylindric or oval-oblong; lid systylic; 
peristome none; pedicel red. Stem 1—2 c. m. or lower. Mon- 
oecious or synoecious. — Wet soil often near sea sometimes — 
in alps. — Eur. not uncommon. Sweden, Norway! Spetsbergen: 
Berggren. Amer. Can.: J. Macoun; Drummond;  Waghorne. 
Alaska: J. M. Macoun. : SI 
*D.Ryani Philibert. — Pottia Phil; Didymodon Kindb. © - 
»Leaves very small, oval or short-oblong, very obtuse and 
entire. Lid of capsule short and thick. — Eur. Norway: 
Ryan»: Philibert revue bryol. 1896. 
37.D.heimioides Kindb. — Pottia Kindb. eat. Can. m. 
Leaves suboblong, the lower obtuse, the upper short-acuminate 
acute; costa gen. exeurrent. . Capsule cylindric longer and nar- 
rower than in the last; peristome present but rudimentary; pe- 
dicel golden yellow. Stem only 2—3 m. m. high. Otherwise 
as the last. — Earth in alps r. Amer. Can. Rocky. mts: Ma- 
coun, | desti 
€. Leaves smooth distantly dentate or denticulate. 
38.D.riparius Austin. — Pottia Aust; Sulliv. icon. m.; Didy- 
modon Kindb.; Barbula lingulata Warnstorf; Trichostomum 
Warnstorffii Limpricht. dint 
Leaves oval-oblong or lingulate obtuse sometimes apiculate, 
sparingly denticulate near apex sometimes to Vas patent when 
moist; only the lowest basal cells rectangular; costa, not or 
scarcely percurrent. Capsule oblong-cylindrie; peristome Wn- 
known; annulus broad. Stem to 3 c. m. high, sometimes with. 
propagula. — Wet rocks near water r. Eur. Switzerl: Weber; 
Culmann, com. Husnot. Amer. U. S.: Austin, com. 
Britton. bias 
39.D.Macounii Kindb. (new name). — Leptodontium canadense | 
Kindb. cat. Canad. m. i qu 
Leaves lanceolate or narrowly oblong-lingulate acute, coarsely | 
dentate at least’ in upper half, spreading when moist; lower - 
basal cells rectangular; costa percurrent or short-excurr ae 
Stem scarcely. 1 e. m. high. Capsules and male plants Un 
known. — Stones in rivers r. Amer. Can.: J. Maeoum. . 
qI 
