260 BULLETIN OF THE UNIVERSITY OP WISCONSIN, 



of one layer of cells, upper part of leaf two-layered; costa strong, about 

 one-third width leaf; leaf cells in the lower part round-quadrate, at the 

 base near costa rectangular: conial leaves shorter with the costa often dis- 

 appearing below apex, margin sometimes irregularly toothed: inner peri- 

 gonial and perichastial leaves ecostate, margin erenulate, convex surface 

 strongly papillose. Limpr. Laubm. 1: 145. On rocks, altitude 5,500 ft.— 

 Vancouver Island. 



31. Andreeea IJlyttii Schimp. — Very small slender and densely pulvi- 

 nate, brownish black to deep black: stem very slender, rather rigid, brittle, 

 fastigiate-branched, rooting: leaves divaricate homomallous, those near 

 the tips falcate-secund, from an oval or ovate base suddenly subulate, 

 nearly smooth, shining, brittle; costa semi-terete, occupying almost all the 

 subula, terete at apex; cells near apex round, at base all rectangular: 

 5 plants gregarious, more slender than ?, perigonial Ivs. 6, the 3 inner 

 united into a bud, acuminate, ecostate; antheridia 5-6, long pedicellate, 

 with longer filiform flexuous paraphyses: perichjetium large, far exceeding 

 stem leaves, external leaves erect, costate to apex, internal subcon volute, 

 elongate-obovate, short apiculate, ecostate: capsule very small, conic-ovate. 

 Sch. Syn. Muse. Eur. 821. ] 876.— Greenland. 



33. Andrea^a Macoiiiiii Kindb. — Dioicous: tufts soft, dark brown or 

 brick red, not glossy: stems about 5 cm. high: leaves narrow, suddenly 

 long acuminate from broader base, distinctly but faintly papillose, more or 

 less curved, uppermost falcate, when dry sub-crispate; cells uniform sub- 

 quadrate; costa narrow, linear, nearly smooth, in the upper leaves long 

 excurrent and denticulate, sometimes to middle. Bull. Torr. Bot. Club 

 17: 82. 1890. — In cushions and fiat mats on inclined faces of rocks on 

 mountains and by brooks flowing from perpetual snow. Gold Range, B. C. 



33. Andreaea nivalis Hook. — Dioicous: tufts broad, thicK, soft, dirty 

 greenish brown, reddish brown or black, not glossy: stem 4-10 cm. long: 

 leaves more or less falcate, crispate when dry, uniformly elongated into a 

 sharp point from a somewhat enlarged or auricled base; lamina 1-layered, 

 papillose on both surfaces, irregularly toothed near apex; costa quite 

 strong, uniform in width even to apex; leaf cells quadrate or short rectan- 

 gular: perigonial leaves ecostate, broadly oval, suddenly long pointed; peri- 

 chaetial leaves quite similar to stem leaves. Limpr. Laubm. 1: 152. — Mt. 

 Hood, Oregon. 



34. Arcliidinm HalHi luiuus R. & O. — Smaller, leaves shorter, costa 

 percurrent or short excurrent. Bot. Gaz. 19: 237. 1894. — Louisiana. 



35. Pliascum subexsertum Hook.i— Stemless, cespitose: leaves Ungu- 

 late oblong, spreading, apiculate: capsule spherical, sub-exserted, lid 

 acuminate. Mac. Cat. 12. — Northwest Territory. 



1 This species is not suflBciently known (Ren. & Card). Wilson states that this is per- 

 haps only a remarkable variety of P. cusp idatum.— Hook, Journal Bot. 3: 433. 1841. 



