— 196 — 
Leaves faintly serrulate in upper part of acumen, moré c 
less curved and’ patent but not spreading when 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 
serrate ridges at back néar apex. Perichetial leaves not lon; 
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.! Amer, 
Alaska: J. M. Macoun. Can.: J. Macoun; Waghorne. U. 8. 
Sullivant, com. C. Mueller; Roell. 
* D.involutum Kindb. n. subsp. » as 
Leaves faleate not or sparingly porose, 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. VERE 
39.D.Bonjeani 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. — Dogs 
Eur. not common. Sweden (common), Norway! Amer. r. Cans 
Macoun. : 
40.D.undulifolium C. M. et Kindb. 1. c, a 
Leaves nearly entire, often obtuse at apex, nearly appressed 
and slightly undulate when dry; cells as in the last; costa m 
lamellate but denticulate at back near apex. Tufts gold 
glossy, sparingly radiculose. Capsules unknown. — In alps t 
Amer. Can. Rocky mts 2500 metr. a. s: Macoun; Vane 
Roell. .U. S.: Roell. és 
41.D.angustum Lindberg; Kindb. rev. bryol. 1896. 
_ Leaves entire not undulate, narrower and less spreading th 
in D. Bonjeani, often nearly straight and suberect; cells a8 
the same species but gen. not porose; costa pereurrent, nea 
smooth without ridges at back. Capsule sulcate. Tufts ) 
wish green. — Bogs r. Ewr. northern. districts. Norway! 
Brotherus. «Sweden prine. in Lapland: E. Nyman. uw 
42.D.Roellii Kindb. in Hedwigia 1896 p. 60. — D. Bonje 
var. Roellii Barnes, : 
Differs . from D. Bonjeani in leaves neither spreading 
undulate and their costa sometimes bilamellate. — More £ 
to D. scoparium; differs from’ it in leaves faintly orenulate 
