BARNES NORTH AMERICAN MOSSES. 323 



cells here and there; costa vanishing below apex; cells roundish-hexagonal: 

 dioicous; male flowers discoid, antheridia few, paraphyses strongly thick- 

 ened at apex; female flowers and fruit unknown. Bry. Eu. Mnium Suppl. 

 5. pi. 400. Hartm. Skand. Flora 2: 51. [Ed. 10.].— Greenland. 



356. Aulacomuium palustre congestum Boul. — Tufts thick, radiculose: 

 branches short: upper leaves slightly secund, sharp pointed. Limpr. 

 Laubm. 2: 530.— Isl. Miquelon. 



3o(J. Aulacomuium palustre laxifolium Kindb. — Leaves laxly dis- 

 posed. Mac. Cat. 145. — British Columbia. 



357. Timmia Megapel itana Bavarlca Brid. — Leaves uniform in size; 

 leaf sheath not papillose on back. — F. Bavarlca Hessl. Limpr. Laubm. 

 2: 581. 



358. Timmia Norvegica Zett. — Dioicous: tufts lax, yellowish-green, 

 below brown and laxly radiculose: leaves when old easily breaking off at 

 insertion, above longer and narrower, from a short faintly sheathing base 

 gradually linear-lanceolate, short pointed, erect-spreading, when dry falcate 

 or spirally incurved twisted and almost crispate, from apex to middle short 

 toothed, faintly toothed for remainder; costa strong, red, percurrent or 

 vanishing; cells coarsely papillose in lower dorsal half , upper cells roundish 

 quadrate or hexagonal, below gradually rectangular, in sheathing part 

 elongated rectangular, distinctly pitted: capsule horizontal, oblong oval, 

 short-necked; cilia of endostome delicate, not appendiculate. — -Limpr. 

 Laubm. 2: 580. On muddy banks: Hector and discharge of Devils Lake, 

 Rocky Mountains; Greenland. 



359. Timmia Austriaca brevifolia Ren. & Card. — Stems shorter; leaves 

 more crowded, shorter and erect-imbricate, scarcely flexuous when dry. 

 Bot. Gaz. 19: 238. — Springdale, Colorado. 



360. Atrichum undulatum altecristatum Ren. & Card. — Lamellae 

 of the leaves much higher than in typical form; capsule narrower, erect. 

 Bot. Gaz. 15: 58. — Kansas; Pennsylvania. 



36 1. Atrichum leiopliyllum Kindb. — Plants erect, simple, naked below, 

 densely foliate above: leaves smooth, lower very small, upper lanceolate, 

 acute-cuspidate, not margined, base scarcely broader; borders sharply ser- 

 rate with large teeth, basal only entire; basilar cells narrow, others round- 

 hexagonal, all pellucid; costa percurrent; lamellae 6, disappearing below 

 apex, entire or slightly crenulate; perichaetial leaves long cuspidate, costa 

 excurrent: capsule single, sub-cylindrical, broad, slightly curved, constricted 

 at mouth; lid obliquely rostrate from conic base. Mac. Cat. 148. — In 

 damp woods: Vancouver Island; Selkirk ounta ; 



362. Atrichum rosulatum C. M. & Kindb. — Dioicous: stem indistinct 

 or very short: leaves rosulate, undulate, not margined, dentate at middle, 

 sometimes beset with transverse rows of scales, lower sub-oblong, upper 



