— 129 — 



Capsule large arcuate; annulus broad; lid subobtuse; pedicel 

 long. Tufts us. green. — Gen. common, r. in alp. regions. 

 Eur. Sweden, Switzerl.l Amer. Can.: Macoun. U. S.: Roell. 



* H.longinerve Kindb. rat. Can, m. 



Leaves mostly curved; costa gen, long-excui-rent. Tufts some- 

 times brown. - — Rare. Amer. Can.: Macoun. 



* H.Kochii Br. eur. — H. curvipes Guerabel; Amblystegium 

 Schimp. syn. 



Leaves oval-oblong gen. straight; middle cells lanceolate. — 

 Rare. Eur. France: Berthoumieu. Amer. Can.: Macoun. 

 T.H.vacillans Sullivant. — Amblystegium Sull. icon, m.; Hyp- 

 num Lesq. et Jam. 



Differs from H. riparium: Leaves not large, those of branches 

 often obtusate with oblong apical cells, the perichetial with 

 excurrent costa. Capsule pmall more sti-angulate; lid obtuse; 

 pedicel thin and short. — R. Eur. France, Calvados: Brebisson 

 (Husnot M. Gall. n. 393). Amer. Can. Owen Sound: Macoun. 

 U. S.: Roell; N. Jersey: com. Macoun. 



2. Revolventia, 

 S.H.revolvens Swartz. 



Leaves circinnate, from short subovate base narrowed to the 

 longer acumen, not striate, entire and not decurrent, us. reddish; 

 cells linear exc. the wider (lower) basal; costa gen. vanishing 

 below acumen. Capsule large arcuate; annulus broad; lid api- 

 culate; pedicel gen. long. Stem irregularly pinnate. Monoecious 

 not r. fruiting. — Alpine princ. northern districts. Eur. Nor- 

 way (common)l Sweden: Lindberg; M. Huss. England: Holt. 

 France: Husnot. Amer. r. Alaska: J. M. Macoun. Greenl.: 

 Berggren; Vanhoeffen. Can.: Macoun; Waghorne. 

 y.H.Cossoiii Schimper. — H. intermedium Lindb. 



Differs from the last: Leaves not circinnate, their acuQien 

 not longer than the us. subovate base. Tufts green or brown- 

 yellow. Dioecious r. fruiting. — Eur. princ. in northern districts. 

 Sweden, Norway, Switzerl.l Amer. r. Can.: Macoun. 



* H.vernicosum Lindberg. 



Leaves shorter and broader, short- acuminate, striate when 

 dry; costa often short. Stem us. pinnate. Tufts us. yellowish. 

 — Eur. Sweden!; Lindberg. Norway! Amer. r. Can.: Macoun. 



* H.rigidum Kindb. enum. bryin. dovr. (as var) 



Leaves larger with narrowly ovate-oblong base, brown-green. 

 Stem somewhat I'igid when dry. Capsules not found. — Alp. 

 region r. Eur. Norway! 



