— 193 — 



gerrdte acumen, ub. nearly straight, often' brittle, Home'ti'me'e 

 convolute below; alar cells dilated j'ellow, inner basal hyaline 

 narrower, other cells; long. Perichetial leaves acuminate costate 

 -long-aristate. Capsule sulcate us. solitary. Tufts dark green. 

 -^— Earth in woods. Amer. r. Can.: Macoun; Waghorne. U. S.: 

 Boell. 



27.D.consol)riiniin Renauld et Cardot. 



Differs from the last: Leaves shorter, perichetialshort-aristate 

 often emarginate; capsules smooth often in pairs. — Amer. r. 

 U. S.: Henry, com. Cardot. 

 ^S.p.scopariiforme Kindb. bull. Torr. club XVI. 



Leaves broadly acuminate' or short- subulate, strongly serrate 

 in upper part of acumen, not brittle, often curved r. undulate; 

 alar cells brown dilated, the others gen. oblong-oval or narrower, 

 r. porose; costa with serrate ridges at back. Inner perichetial 

 leaves nerveless, emarginate or crennlate above. Capsule smooth. 

 Tufts green. — Amer. r. Can. Rocky mts: Macoun. U. S. Mi- 

 chigan: Purpup, com. Roell. 

 29.D.caniptophjiluin Kindb. n. sp. 



Leaves tapering to a long subulate in upper half strongly 

 serrate acumen, falcate and not crisped when dry; cells not 

 porose: those of acumen subquadrate, the alar yellow dilated 

 subrectangular reaching to costa; other basal cells long. Peri- 

 chetial leaves obtusate or abruptly tapering to a gen. longer, 

 narrow-subulate or subfiliform awn with long-excurrent costa. 

 Capsule solitary not sulcate. Tufts green above. — Amer. r. 

 Can. Northern Labrador: Macoun 1896. 



B. Costa of leaves faintly rough at back. Upper leaf-cells 

 gen. short. Capsule solitary sulcate. 



a. Leaves not brittle, gen. broad at base; angular cells di- 

 versiform: alar dilated brown persistent, inner basal narrow. 

 Capsule long-pedicellate. 

 30.D.Bergeri Blandow. — D. Schraderi Weber et Mohr. 



Leaves us. tapering to a long broadly sublinear in upper 

 part serrulate often obtuse acumen, often undulate and flexuous; 

 upper cells short; costa not percurrent. Perichetial leaves often 

 emarginate and short-aristate. Tufts us. brown-green. ■ — Peat- 

 bogs and swamps gen. common. Eur. Sweden, Norwayl Amer, 

 Can.: Macoun. Greenl.: Vanhoeffen. 

 *D.rupincola Kindb. n. subsp. 



Leaves subulate-acuminate; costa percurrent, serrulate at back. 



