— 196 — 



' - Leaves faintly serralate' in upper "part" of acumen, mare ot 

 iess curved and' patent but not spreading "wTien dry, r. undu- 

 late; angular cells diversiform, the alar brown more- dilated, 

 the inner pale yellow or less often hyaline; other cells gen. 

 long, the uppermost sometimes suboblong; costa us. with 2 

 serrate ridges at back near "apex. Perichetial leaves not long- 

 aristate. Capsule -not sulcate. Tufts us. green, sometimes 

 blackish. — Dry places common, less often in bogs and some- 

 what r. in alp. regions Eur. Sweden, Norway, Switzerl.i Amer. 

 Alaska: J. M. Macoun. Can.: J. Macoun; Waghorne. U. S.: 

 Sullivant, com. C. Mueller; Roell. 

 *D.inTOlutum Kindb. n. subsp. 



Leaves falcate not or sparingly porbse, very concave, subcon- 

 volute in middle, very chlorophyllose, sometimes undulate; cells 

 gen. oblong-oval. Capsules unknown. — Amer. r. Can. Vane, 

 isl.: Macoun. U. S,: Roell. 

 39.D.Bonjeam Notaris. — D. palustre Br. eur. 



Leaves nearly entire; spreading and undulate when dry, often 

 nearly straight; cells as in D. scoparium; costa nearly smooth 

 without ridges at back, us. not percurrent. Perichetial leaves 

 short-aristate. Capsule sulcate. Tufts us. yellowish. — Bogs. 

 Eur. not common. Sweden (common), Norwayl Amer. r Can.: 

 Macoun. 

 40.D.undulifoIium C. M. et Kindb. 1. c. 



Leaves nearly entire, often obtuse at apex, nearly appressed 

 and slightly undulate when dry; cells as in the last; costa not 

 lamellate but denticulate at back near apex. Tufts golden 

 glossy, sparingly radiculose. Capsules unknown. — In alps r. 

 Amer. Can. Rocky mts 2500 metr. a. s.: Macoun; "Vane, isl.: 

 Roell. U. S.: Roell. 

 41.D.aiigustnm Lindberg; Kindb. rev. bryol. 1896. 



Leaves entire not undulate, narrower and less spreading than 

 in D. Bonjeani, often nearly straight and suberect; cells as in 

 the same species but gen. not porose; costa percurrent, nearly 

 smooth without ridges at back. Capsule sulcate. Tufts yello- 

 wish green. ■ — Bogs r. Eur. northern districts. Norwayl Finl.: 

 BrotheruB. Sweden princ. in Lapland: E. Nyman. 

 d:2.D.Roellii Kindb. in Hedwigia 1896 p. 60. — D. Bonjeani 

 var. Roellii Barnes. 



Differs from B. Bonjeani in leaves neither spreading nor 

 undulate and their costa sometimes bilamellate. — More allied 

 to D. scoparium; differs from it in leaves faintly crenulate at 



