— 108 — 



a. Leaves gen. entire and glossy. Annulus of capsule 

 narrow. Dioecious. 



3.B. albicans Necker. — Hypnum Neck.; Brachj'thecium Br. 

 eur. 



Leaves (at least on branches) with long subulate acumen, 

 sometimes small; alar cells well-defined on a narrow-rectangular 

 space, the others linear-lanceolate; costa often reaching to acu- 

 men. Stem-leaves us. subovate or with ovate base; branch- 

 leaves ovate-oblong or ovate-lanceolate. Capsule small suboval 

 or faintly curved; pedicel not long. Tufts us. pale or whitish 

 green. — Mostly on dry sand. Eur. not uncommon. Sweden!; 

 M. Huss, fruiting. Amer. r. Can.: Macoun. Alaska: Pahner. U. 

 S.: Roell, com. Cardot. 

 4.B.glareosum Bruch; Br. eur. — B. tauriscorum Molendo. 



Leaves large with subulate acumen and long filiform often 

 twisted point; alar cells well-defined, also the lowest basal short, 

 the others Unear-lanceolate; costa gen. vanishing near middle. 

 Stem-leaves abruptly narrowed, broadly ovate-oblong. Branch- 

 leaves ovate-lanceolate with long subulate faintly denticulate 

 acumen and shorter point. Capsule large arcuate; pedicel us, 

 short. Tufts us. pale green or yellowish. Stem eradiculose 

 sometimes with paraphyllia. — Dry gravelly or calcareous places 

 and stone-walls. Eur. not common. Sweden, Norway, Switzerl.! 

 Amer. r. Can.: Macoun; Drummond n. 174. 

 5.B.turgidum C. Hartman. 



Leaves large entire ovate-lanceolate with subulate not long 

 acumen; alar cells few and small, the others sublinear; costa 

 vanishing near middle or somewhat longer. Capsula arcuate; 

 pedicel not long. Tufts loose eradiculose yellow-green oi' golden 

 glossy. Stem robust turgid often long and simple. — Swamps 

 in alps r. Eur. Norway (fruit.)!; C. Hartman. Spetsbergen: R. 

 Gyllencreutz. Amer. Alaska: J. M. Macoun. GreenL: Berggren. 

 Can.: Macoun. 



b. Leaves faintly denticulate above and entire below, not 

 glossy. Capsule not annulate. Monoecious. 

 G.B.digastrnm C. M. et Kindb. cat. Cannd. m. 



Leaves large recurved to the short subulate acumen; alar 

 cells small green not well-defined, the others lower suboval, 

 the upper oblong-lanceolate; costa vanishing near acumen. 

 Stem-leaves broad-ovate; branch-leaves ovate-oblong. Capsule 

 curved; segments short; lid sometimes apiculate; pedicel not 

 long. Tufts olivaceous or green. - — Rocks r. Amer. Can.; Ma- 

 coun; Moser. 



