— 323 — 
1.B.stricta Bridel. 
Capsule gen. erect; peristome simple; pedicel exserted. Tufts 
glaucous green above. Synoecious. — Siliceous ground r. Eur. 
princ. in Mediterr. distr. France: Schimper. Italy: Bottini. 
Amer. »U. S.»: Lesq. et Jam. 
B. Leaves abruptly narrowed from the not reflexed us. . 
hyaline sheath; costa more or less filling subula. 
2.B.ithyphylla Bridel. 
Capsule inclined; peristome us. double. Costa of leaves not 
well-defined above but us. not wholly filling subula. Tufts us. 
glaucous green. Synoecious. — On stone. Eur. common. Swe- 
den, Norway, Switzerl! Amer. Greenl.: Vanhoeffen. Alaska: 
J. M. Macoun. Can.: J. Macoun; Waghorne. 
* B.breviseta Lindberg. 
Capsule deflexed when young, suberect when old; peristome 
simple rudimentary or wanting; pedicel scarcely exserted. Costa 
filling subula of leaf. — Northern princ. arctic district r. Eur, 
»Norway: Th. Fries»: Lindberg. Amer. Alaska: J. M. Macoun. 
Can.: Wagborne. ; 
*Brigidula (Schimper as var. Kindb. n. subsp. 
Capsule smaller; pedicel exserted. Leaves rigid brittle ap- 
pressed when dry. — Alp. and arctic distr. r. Hur. Norway! 
Amer. »Greenl.»: Lange. ; 
3.B.viridissima Bridel. —  »Weisia Brid. 1826»: Limpr. — 
B. subulata Br. eur. 1846. 
Differs from B. ithyphylla: Capsule smaller, erect when moist; 
peristome simple rudimentary us. wanting. Leaves smaller, 
costa often not defined in subula. Paroecious. — Rocks in 
higher alp. and arctic distr. r. Eur. Switzerl.! Austria: Breidler. 
Amer. Greenl: Vanhoeffen. »Alaska and U. 8.»: Lesq. et Jam. 
. 2, Crisps. 
A. Upper leaf-cells short-rectangular. Leaves crowded very 
distinctly sheathing, more or less flexuous but not crisped. 
4.B.norvegica Gunner. — Bryum Gunn. 1772; Bartramia Lindb.; 
Webera Halleri Hedwig 1782; Bartramia: Hedw. 1789. 
Leaves not decurrent, abruptly tapering and long-subulate; 
costa long-excurrent. Pedicel not much longer than capsule. 
Monoecious or subparoecious. — Rocks often near cascades. 
Eur. not r., nearly common in alps. Sweden, Norway, Switzerl.! 
Amer. r. »Can. Rocky mts: Drummond»: Lesq. et Jam. 
B. Upper leaf-cells subquadrate. Leaves crisped or circinnate. 
a. Leaves crowded, not distinctly sheathing. 
