378 



MUSCI. Grimmia. 



Yoseniite Valley {Bolander) ; Colorado River {Bigelow) ; Uinta Mountains ( Watson) ; common 

 eastward, from Arctic America to the Atlantic States, and in most quarters of the globe. An 

 exceedingly variable species. Var. rivu/aris, Nees & Hornsch., a large form, 2 or 3 inches high, 

 with ovate-lanceolate obtusish leaves, and shorter capsule becoming turbinate, is found on wet 

 rocks in Yosemite Valley, Bolander. 



§ 3. Capsule more or less exserted tipon an arcuate pedicel: calyptra larger, 

 mostly mitriform and lobed at base : operculum conic, obtuse or rostrate, 

 deciduous without the columella : leaves all setosely tipped. — Grimmia 

 proper. 



* Calyptra campanulate-cueullate : flowers Tnoncecious. 



4. Gr. Jamesii, Austin. In compact hemispherical tufts : leaves crowded above, 

 erect when dry, oblong- to ovate-lanceolate, convolute-concave above the middle, 

 tip))ed with a white scabrous subulate-tiliform seta, the costa reaching to the apex, 

 areolation at the angles enlarged-quadrate : calyptra large, unequally lobed at base : 

 capsule round-oval, slightly exserted upon a slender yellow pedicel, from yellow 

 becoming red, obconic when dry and slightly striate ; operculum very shortly 

 convex-acuminate ; annulus obscure : teeth pale red, very short, broad, 3 - 4-cleft, 

 and much perforated below. — Torr. Bot. Bull. vi. 43. G. orbicularis, James, Bot. 

 King Exp. 403, not Bruch & Schimp. 



On dry rocks near Carson City, Watson. With the strongly cribrose peristome of Coscinodon, 

 but the calyptra cucullate and not plicate. 



* % Calyptra mitriform and lobed, straight or oblique. 



■i- Floivers monoecious. 



5. Gr. pulvinata, Smith. Resembling the last, but less crowded and somewhat 

 paler, \io \ inch high : leaves oblong-lanceolate, the margin slightly thickened : 

 capsule upon a longer pedicel, distinctly striate, costate when dry, firmer, brow^n ; 

 operculum convex, rostrate ; annulus broader : teeth bright purple, longer, sparingly 

 perforated, unequally bifid. —Engl. Bot. t. 1728; Bruch & Schimp. 1. c, t. 239 ; 

 Wilson, 1. c, t. 13; Sulliv. & Lesq. Muse. Am.-Bor. Exsicc. n. 137^ 



Near Ukiah, on Russian River, and about Clear Lake {Bolander) ; on William's River, Arizona 

 {Bigelow) ; Hot Sjn-ing Mountains, Nevada, and the Uintas ( Watson) ; Fort Colville {Li/all) ; 

 Arctic America {Taylor-) ; and widely distributed through the Old World. 



■i- -i- Flowers dioecious. 



6. G. contorta, Schimp. Rounded tufts soft, deep green, blackish below^ : 

 leaves spreading-incurved, crisped when dry, lanceolate to linear-subulate, hyaline at 

 the apex or shortly setose, somewhat folded-carinate, the margin recurved below ; 

 perichaetial leaves 8 or 9, subulate, spreading : capsule nodding upon a somewhat 

 arcuate pedicel, erect when dry, oval, soft, yellowish, small : operculum convex- 

 conic, obtuse : annulus broad : teeth orange-red, reflexed when dry, bifid to below 

 the middle and perforated. — G. uncinata, Kaulf. ; Bruch & Schimp. 1. c, t. 248. 

 G. incurva, Schwaegr. Suppl. ii. t. 97. 



Big Tree Grove {Bolander) ; alpine regions of Europe. 



7. Gr. Muhlenbeckii, Schimp. Loosely tufted, soft, from green becoming 

 hoary ; stems tall, branching : leaves densely crowded, erect when dry, long- 

 lanceolate, channelled along the very prominent costa, carinate at the apex, with 

 flat margins, the upper leaves tipped with a rather long very rough hair : capsule 

 exsei'ted upon an arcuate pedicel, somewhat pendulous, oval, smooth, brownish, 

 with a convex apiculate operculum and narrow annulus : teeth reddish purple, erect 

 when dry, entire, rarely sliglitly bifid. — G. imurva, Brucli & Schimp. 1. c, t. 243. 



Mount Dana, at 10,.500 feet altitude {Bolander) ; Alps of Europe. 



8. G-. trichophylla, Grev. Loosely tufted, soft, yellowish or green ; stems \ 

 to 1 inch long : leaves .spreading, incurved when dr}', oblong-lanceolate, attenuate to 



