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phort or indistinct. PericVietial leaves short-apiculate nearly 

 without lamellae. Capsule globose or broad-oval; lid short-api- 

 culate. Stem low simple or very slightly branched. Habit of 

 P. scxangulare. — Higher alp region r. Eur. Norwayl Amer. 

 Can : J. Macoun. Alaska: J. M. Macoun. Greenl.: Vanhoeffen. 

 14.P.po!are C. Mueller. 



Differs from the last in more distinct and dentate awn of 

 leaves; capsule oval often oblique; stem divided somewhat high. 

 — Arctic distr. r. Amer. Greenl.: Pansch, com. C. Mueller. 

 HI. En-Polj'trichum. 



A. Capsule green and not distinctly angled when unripe, 

 us. 6-angled when ripe. Leaves channelled or with inflexed 

 wings, not appressed when dry; awn red-brown or indistinct; 

 apical cell of lamina not papillate. Stem simple. 

 15.P.sexaiigulare Floerke. — P. septemtrionale C. M. syn. 



Leaves short obtusate obtuse entire or at apex with very 

 few teeth, not rough at back; wings very narrow or indistinct; 

 lamellfe about 30; awn indistinct or very short and red. Cap- 

 sule suboval finally short-prismatic; pedicel yellowish or pale 

 red not long. Stem not tomentose us. low. Habit of P. al-pi- 

 num. — On earth in higher alp. region. Eur. less r. Norway! 

 Sweden: Indebetou. Amer. r. Can. Brit. Col.: Macoun. U. S.: 

 Roell. 

 16.P.gracile Dickson; Menzies. 



Leaves long subulate-acuminate dentate to the sheath, us. 

 green; wings broad princ. below; lamelte about 40; awn brownish 

 not long. Perichetial leaves hyaline-bordered. Capsule round- 

 oval finally cubic; apophysis sometimes less distinct; lid broad- 

 conic when young, finally apiculate or rostellate; pedicel long 

 yellowish or finally reddish. Spores about 0,02 m. m. Stem 

 us. tomentose below, often high. — Turfy soil and rocks also 

 in alps. Eur. not r. Sweden, Norwayl Amer. not common. 

 Can.: Macoun. 



B. Capsule 4-angled prismatic soon becoming brown. Leaves 

 acuminate acute with distinct wings. 



a. Leaves entire or above with few teeth, channelled or 

 convolute; apical cell of lamellse unipapillate. Perichetial leaves 

 hyaline above. 

 1 T.P.jumperinuiii Willdenow. 



Leaves long long-subulate gen, entire, very patent or curved 

 when moist, us. not appressed when dry; laniellse about 50; 

 Costa rough above at back; awn long rough wholly red. 



