— 71 — 



Leaves subovate or ovate-obLong acute often short-pointed; 

 upper cells sublinear, lower lanceolate exc. the dilated well- 

 defined alar. Capsule arcuate; lid conic obtuse not rostelJate. 

 Tufts dense green. Stem subpinnate. Leaves somewhat smaller 

 than in P. denticulatum. Monoecious. — Stones in woods r. 

 Amer. Can.: Macoun. 



B. Leaves and capsules small; pedicel short. 



a. Leaves not recurved. 



T.P.laetum Schimper. — Leskea Berggren. 



Leaves ovate-lanceolate acuminate graduallj^ tapering to a 

 Hhort filiform point; alar cells large well-defined, the others 

 oblong-lanceolate. Capsule oval-oblong sub.symmetric; lid rostellate. 

 Tufts bright green. Monoecious. — Alp. and subalp. rocks r. 

 Eur. Norway!; Berggren. Amer. Can.: Macoun. 

 S.P.decursivifolluni Kindb. cat. Can. m. — »P. passaicense» 

 Austin in part. 



Leaves narrowly suboblong often with short aciculiform point," 

 lowest basal cells short large, alar not well-defined, the others 

 narrow-linear. Capsule suboblong or arcuate, finally furrowed 

 and oblique; lid rostellate or rostrate; pedicel somewhat long. 

 Tufts green. Monoecious. — On decaying trees r. Amer. Can.: 

 Macoun; Waghorne. 

 9.P.latebricola Wilson. — Leskea Wils.; Plagiotheeium Br. eur. 



Leaves smaller than in P. pulchellum, gen. filiform-pointed. 

 Stem-leaves ovate-oblong subobtusate long-pointed; branch-leaves 

 ovate lanceolate gradually tajjering to a short sometimes subulate 

 point; alar cells not well-defined, the others narrow-linear. Cap- 

 sule cylindric-oblong straight; lid rostellate. Tufts bright green. 

 Dioecious. — ■ On decaying trees or ferns in shady woods r. 

 Eur. Sweden: J. Persson. Germany: H. Mueller, com. Le Jolis. 

 Belgium: Gravet. Amer. »U. S. and Can.»: Lesq. et Jam. 



b. Leaves more or less recurved. 



aa. Leaves recurved to the gen. long filiform point. 

 lO.P.piliferum Swartz. — Leskea Sw.; Plagiolhecium Br. eur. 



Leaves suboblong; alar cells not well-defined, the others 

 narrow-linear. Capsule cylindric-oblong straight; lid rostellate. 

 Tufts green us. glossy. Monoecious. — Shady rocks or their 

 crevices gen. r. Eur. Sweden not r., Norway! Amer. Can. Pacif. 

 distr.: Macoun. 



bb. Leaves partly recurved below, without long point. 

 ll.P.aciculari-pungens C. M. et Kindb. cat. Can. m. 



Leaves ovate-oblong with short aciculiform deflexed or patent 



