Bacojnitriiun.] BRYACE^. 151 



Hab. Moist rocks in mountains; Alleghany Mountains {Still in ant); 

 White Mountains (James); Oregon (Hall); Coeur d'Alene Lake, Idaho 

 (Watson). 



10. R. lanuginosum, Brid. Tufts very wide, thick, gray- 

 ish white ; plants long and slender, dichotomous and ramulose ; 

 lateral branches numerous : leaves very close, long, open, erect 

 or recurved and falcate-secund at the apex, narrowly costate, 

 narrowly lanceolate, bordered from the middle upward by a 

 pellucid ciliate-dentate papillose membrane, gradually passing 

 into a pellucid more or less deeply ciliate-dentate point ; cells of 

 the margin very small, punctiform, those of the lamina linear, 

 deeply crenulate : calyptra rough at the apex only : capsule 

 oblong-ovate, solid, with a short rough pedicel; teeth long, 

 regularly bifid ; annulus very broad. — Muse. Recent. Suppl. 

 iv. 79; Bryol. Eur. t. 269. Trichostomum lanuginosum, Hedw. 

 Muse. Frond, iii. 3, t. 2. T. Cmiadense, Michx. Fl. Bor.-Am. 

 ii. 296 ? 



Hab. On granite rocks in mountains ; common. 



11. R. canescens, Brid. 1. c. Plants in loose wide flat 

 yellowish green or whitish tufts ; stems erect, dichotomous ; 

 lateral branchlets short : leaves spreading, curved up or down, 

 often turned to one side, oblong at base, deeply cai-inate, with 

 borders reflexed from the base to the apex, lanceolate to a 

 pellucid crenulate point or blunt at the apex, papillose over the 

 whole surface : calyptra with a long subulate point, rough at 

 the apex only : capsule conical, nari'ow at the orifice, angular 

 when dry, coriaceous, on a long purple pedicel, which is flattened 

 and twisted to the left when dry ; lid acute or needle-shaped, 

 as long as the capsule, erect or oblique ; annulus and peristome 

 as in the last species. — Bryol. Eur. t. 270, 271. Trichostomimi 

 canescens, Hedw. Muse. Frond, iii. 5, t. 3, 



Var. ericoides, Bruch & Schimp. Lateral branches short, 

 obtuse, very numerous, aggregated, nodose : pellucid point of 

 the leaves short. — R. ericoides, Brid. 1. c. 78. 



Var. lutescens. Leaves longer, yellowish, pellucid, the 

 surface mostly smooth or indistinctly papillose ; borders of the 

 hyaline point denticulate (not rugose-papillose) : capsule scarce- 

 ly plicate, not angular when dry. 



Hab. On rocks in mountain districts; the first variety on rocks in 

 arid places, Sitka (Bischoff), and Oregon (Hall); the second on shaded 

 rocks, California (Bolander). 



