OrthotrlcJnim.] BRYACE.E. 177 



31. O. obtusifolium, Sclirad. DicBcious: plants small, 

 irregularly pulvinate, pale green or yellowish above, brown be- 

 low : leaves Lalf-spreading from the middle when moist, imbri- 

 cate when dry, oval, oblong-obtuse and slightly serrulate at the 

 hyaline apex, concave, papillose on the back; pericha^tial leaves 

 smaller, sheathing : calyptra covering the capsule to the middle, 

 not hairy, but rough and darker-colored at the apex : cajosule on 

 a very short pedicel, immersed, oval, with a long defluent collum, 

 yellowish, with 8 darker striae, furrowed its whole length when 

 dry; lid conical, acuminate; teeth 8, bigeminate, reflexed Avhen 

 dry, vermiculose, papillose on the oiitside, pale orange color ; 

 cilia 8, yellow, nearly as broad as the teeth, of two series of cells. 

 — Swartz, Muse. Suec. 90, t. 4 ; Bryol. Eur. t. 208. O. Eorjeri (?), 

 Sulliv. & Lesq. Muse. Bor.-Am. Exsicc. ed. 2, n. 174. 



Hab. British America (Drummond); on poplar trees near Elba, in 

 the Adirondacks ( Lei^qiiereux) ; Pennsylvania [James] ; Ontario [Macoun). 



32. O. Jamesianum, Sulliv. Monoecious : plants small, 

 loosely pulvinate, pale green when moist : leaves oblong or 

 oblong-lanceolate, obtuse, revolute on the borders, strongly 

 papillose : calyptra with some hairs : capsule immersed, pyri- 

 form, short-pedicellate and short-necked, 8-costate when dry 

 and constricted under the broad orifice ; peristome simple, of 

 16 distinct teeth, vermiculate transversely below the middle 

 and lengthwise above. — James, Bot. King Exj). 401 ; Sulliv. 

 Icon. Muse. Suppl. 71, t. 53. 



Hab. On limestone roclcs, East Humboldt Momitains, Nevada (Wat- 

 son); Fort St. James, British Columbia [Macoun). 



A very distinct species, easily distinguished from the preceding by the 

 long papillfe on the surface of the leaves, the pyriform capsule, the in- 

 florescence, simple peristome, etc. 



******** Peristome double., the inner of 16 free cilia. 



33. O. Lyellii, Hook. & Tayl. Dioecious: plants of wide 

 growth, loosely cespitose or pulvinate, green : leaves long, 

 linear-lanceolate from the oblong base, sharply acuminate, 

 flexuous, squarrose when moist, somewhat twisted when dry, 

 2)lane on the borders, papillose and beset on the surface with 

 clavate brown densely articulate filaments : male plants smaller : 

 calyptra pilose, large, covering the whole capsule : capsule 

 emergent, ovate, its collum as long as the sporangium, striate, 

 yellowish brown, much elongated and deeply sulcate when dry 



