— 201 — 



Switzerl.! France: J. E. Zetteretedt. Spetsbergen: Berggren. 

 Amer. Greenl.: Berggren. 



b. Leaves small; costa excurrent smooth at back. Tufts 

 dense tomentose. Capsule not large. 

 58.D.elongatuni Schleicher. 



Leaves us. from somewhat broad base short-subulate and 

 entire, nearly all appressed when dry; angular cells diversiform, 

 the alar brown; other cells narrow except the gen. short upper; 

 costa somewhat broad and not long-excurrent. Capsule faintly 

 curved. Tufts green or brownish us. very high. - — Swamps 

 and wet rocks princ. in alps. Eur. nearly common in northern 

 alps. Sweden, Norway! Amer. Can.: Drummond; Macoun; Wag- 

 horne. Greenl.: Wensk, com. Roell. 

 *D.dovrense Kindb. n. subsp. 



Leaves narrower with longer subula, entire and not brittle, 

 nearly all appressed when dry; nearly all cells narrow except 

 the alar; costa longer-excurrent. Capsule faintly curved. — 

 Eur. Norway in Dovrefjeld! 



* D.subfragilifolmni Kindb. n. subsp. 



Leaves narrow long-subulate faintly denticulate above, flexuous, 

 sometimes brittle; costa long-excurrent narrower. Capsule ar- 

 cuate. — Northern alps r. Eur. Norway near Kongswoldl Amer. 

 Can.: Waghorne. 



* D.attemiatum Kindb. n. subsp. 



Leaves larger, gradually tapering to a somewhat long subula, 

 nearly entire and often brittle, the uppermost flexuous; costa 

 short-excurrent. Capsule more or less curved. Habit of B. 

 fragilifolium. Tufts low. — Amer. Can. Labrador: Waghorne. 

 59.D.fragilifolium Lindberg. — D. Macounii Austin in herb. 

 Macoun. 



Leaves from narrow base very long-subulate^ entire and brittle, 

 gen. straight erect or the uppermost flexuous; alar cells r. well- 

 defined, the others gen. rectangular or some few short; costa 

 narrow very long-excurrent. Capsule oblique us. arcuate, larger 

 than in D. elongatum. Tufts low us. green or pale brown. 

 Habit of D. stridum. — On logs in northern princ. subalp. 

 districts r. Eur. Norway! Sweden: S. 0. Lindberg: E. Nyman. 

 Amer. Can.: Drummond; Macoun; Waghorne. 



C. Leaves small entire; costa percurrent smooth at back. 

 Tufts densely radiculose. Capsule small. Habit of D. elongatum. 

 60.D.groeiilan(licum Bridel. — D. labradoricum C. M.; D. 

 tenuinerve Zetteretedt. 



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