— 324 — 



S.B.pomiformis L. — Biyum L.; Baitramia Hedwig. 



Leaves nearly gradually tapering and long-subulate, not de- 

 current, crisped; costa not long-excurrent. Pedicel exserted 

 above' shoots. Monoecious or subparoecious. — On earth priuc. 

 on rocks. Eur. common. Sweden, Norway, Switzerl.l Amer. 

 Can.: Macoun; Waghorne. U. S.: SuUivant, com. C. M. 



b. Leaves sheathing, more or less distant. 

 B.B.crispa Swartz. 



Leaves nearly graduallly tapering to a not long subula, not 

 decurrent, circinnate; costa not long-excurrent. Perichetial leaves 

 with very long-excurrent costa. Pedicel us. not exserted above 

 shoots. Tufts sparingly radiculose, gi-een or dark green. Paroe- 

 cious or synoecious. — Rocks not r. Eur. Sweden I Atner. Can.: 

 Macoun. 

 T.B.glancoTiridis C. M. et Kindb. 1. c. 



Leaves sublinear abruptly short-subulate subcircinnate not 

 decurrent; costa subpercurrent or short-excurrent. Pedicel not 

 long. Tufts glaucous green very radiculose. Subparoecious. — 

 Wet rocks in alps r. Amer. Can. B. C. near Revelstoke: Macoun. 

 S.B.circinnnlata C. M. et Kindb. 1. c. 



Leaves abruptly tapering and long-subulate circinnate decur- 

 rent; costa very long-excurrent. Capsule and flowers unknown. 

 Tufts bright green sparingly radiculose. — Amer. r. Can. Brit. 

 Col.: Macoun. 



II. Plagiopus Bridel. 

 9.B.0ederi Gunner. — Bryum Gunn.; Bartramia Swartz. 



Leaves gradually narrowed short-subulate not sheathing, 

 slightly curling; upper cells subquadrate; costa percurrent. Cap- 

 sule erect when moist, sometimes small. Tufts compact. Synoe- 

 cious. — Rocks princ. in alps. Eur. common in subalp. region. 

 Sweden, Norway, Switzerl.! Amer. Can.: Macoun. 



139. Philonotis Bridel. 

 I. Eu-Fhilonotis. Male flowers disciform with more or less 

 patent leaves. Dioecious. 



1. HomoiuorphaB. Leaves nearly uniform small naiTow, 

 serrate (without double mamiUse at borders), not falcate, often 

 distant. Perigonial leaves acuminate acute. Stem often subcapillary. 



2. Dimorphae. Leaves gen. dimorphous and large, r. distant: 

 some shoi-t subovate with us. not recurved borders, the others 

 gen. ovate-lanceolate or ovate-oblong, often recurved at base and 

 sometimes falcate; borders .serrate or furnished with double 

 mamillse. Stem gen. long and thick with long branches. 



