— 236 — 



in alps, common in northern districts. Eur. Sweden, Norwaj'! 

 Amer. Can.: J. Macoun; Waghorne. Alaska; J. M. Macoun. 



2. Canescentia. 

 2.R.canescen.s Weis. — Hypnum Weis; Racomitrium Brid. 



Leaves from broad ovate-oblong base gen. abruptly tapering 

 to a subacute acumen, recurved nearly all around; upper and 

 alar cells subquadrate, the others rectangular; costa rough at 

 back, us. abbreviate; hairpoint r. short or indistinct. Pedicel 

 us. long. — Stone ground also in alps common. Eur. Sweden, 

 Norway, Switzerl.l Amer. Can.: J. Macoun; Waghorne. Alaska: 

 J. M. Macoun. U. S.: Roell. 

 * R.subfasciculare Kindb. n. subsp. 



Leaves fainter papillose, muticous or with very short hair- 

 point. — Rocks piinc. in alp. region r. Eur. Norway! Austria: 

 Venturi. 

 *R.muticuni Kindb. bull. Torr. club XVII. 



Leaves fainter papillose muticous, finally yellowish brown; 

 costa percurrent. — Alp. region r. Amer. Can. Brit. Col. 1950 

 metr. a. sea: Macoun. 



S.R.Panschii C. Mueller. — Grimmia C. M.; Racomitrium 

 Kindb. 



Differs from B. canescens: Leaves subovate obtuse with very 

 short acumen without hairpoint or only faintly hyaline at apex, 

 faintly papillose. Tufte low blackish. Capsules unknown. — 

 Stem without nodose branches. — Arctic district r. Amer. 

 Greenl. isl. Sabine: Pansch, com. C. Mueller. 



3. Papilloea. 



A. Leaves very broadlj' acuminate or obtusate, arrounded 

 at the us. dentate apex, short broad and channelled, without 

 hairpoint; costa not percurrent. Stem without nodose branchlets. 

 4.R.aciculare L. — Bryum L.; Racomitrium Bridel. 



Leaves us. green or blackish when dry; upper cells rotundate. 

 Capsule suboval; teeth deeply cleft; pedicel somewhat long. — 

 Wet stones also in alps. Eur. nearly common. Sweden, Swit- 

 zerl., Spain! Amer. Can.: J. Macoun; Waghorne. Alaska: J. M. 

 Macoun. 

 5.R.Neevii C. Mueller. 



Leaves us. bright green also when dry; upper cells subqua- 

 drate. Capsule oval-oblong; pedicel short. — Wet rocks r. 

 Amer. Can. princ. in Pacif. distr.: J. Macoun. Alaska: J. M. 

 Macoun. 



B. Leaves narrowly acuminate entire. 



