— 155 — 



lanceolate, denticulate above middle, narrowed at base; lamellae 

 us. 3; costa smooth at back. Capsule subcylindric or subcla- 

 vate; pedicel not long. Stem often high. R. fruiting. — Clay 

 soil or among grass near water. Eur. r. Engl.: Rogers. Amer. 

 less r. Can.: Macoun (fruit.). 

 T.C.tenella Roehling. — Atrichum Br. eur. 



Leaves somewhat small crowded acute not broad, suboblong 

 or oblong-lanceolate not much narrowed below, denticulate also 

 below middle; lameUse 3 — 5; costa dentate above at back. Cap- 

 sule small oblong; pedicel not long. Stem about 1 c. m. or 

 lower. — Wet sandy soil in lower regions. Eur. princ. in 

 northern distr. Sweden not r.l 



69. Oligotrichum Lamarck et De Candolle. 



A. Leaves narrow subvaginant us. brown, faintly crisped 

 when dry. 



a. Leaves with short lamellse at back. 

 l.O.hercynicum Ehrh. — Catharinea Ehrh.; Oligotrichum Lam. 

 et D. C. 



Leaves dentate above at borders and at back, gradually nar- 

 rowed, subulate or acute; lamellse of upper side 8 — 12 cohe- 

 ring, those of under side 3 — 5 near base. Capsule suboblong 

 not or slightly strangulate; pedicel not long; calyptra often with 

 many hairs. — Sandy ground princ. in alps. Eur. less r. in 

 northern distr. Norway! Amer. r. Alaska: J. M. Macoun. 

 2.0.integrifoliuni Kindb. revue bryol. 1894. 



Differs from the last: Leaves broader, subobtuse entire, smooth 

 at back. Capsule thicker below, strangulate plicate when dry. 

 — Alp. region r. Amer. Can. Brit. Col.: Macoun. 



b. Leaves with long lamellae at back. 

 3.0.aligerum Mitten; Sullivant icon. m. 



Leaves longer than in the both last, sublinear subulate or 

 acute, dentate at least above middle of borders; lamellae of 

 upper side 5 — 8 near costa, those of under side 3 — 5 near 

 costa and 4 — 5 near borders. Capsule strangulate narrowly 

 ovate-oblong or subcylindric; lid rostrate; pedicel thin very 

 long; calyptra with few hairs in upper part. — Clay banks in 

 alp. regions r. Amer. Can. Brit. Col.: Macoun. 



B. Leaves broad large not sheathing, green, cirrate-crisped 

 when dry; lamellse long also at back, 3 — 6 near costa on upper 

 side, 2 — 3 near costa and sometimes 1 — 2 rudimentary near 

 borders at back. 



