Grimmia. MUSCI. 3 7 '7 



cluster of very broad leaves filled witli long-pedicelled lentiforin geramaj : female 

 flowers also sometimes gemmiferous: capsules yellowish brown, sometimes in pairs. — 

 Spec. Muse. t. 7, fig. 1 ; Bruch & Schimp. Bryol. Eur. t. 196; Wilson, Bryol. Brit, 

 t. 8 ; SuUiv. in Gray's Manual, 2 ed. t. 2 ; Berkeley, Brit. Moss. t. 19, fig. 8. 



On redwood logs near Big River City {Bolandcr) ; Fort Colville {Lyall) ; fre(iuent in the 

 Atlantic States, and throughout most of the northern hemisphere. 



22. GRIMMIA, Khrh. 



Perennials, growing on rocks, usually in dense tufts or cushions, dichotomously 

 branched. Leaves dull, in 5 to 8 ranks, the lower often smaller, crowded, spreading, 

 lanceolate, the costa usually long-excurrent, mostly entire with narrowly thickened 

 margins, minutely papillose ; areolation quadrate or hexagonal above, at base rectan- 

 gular or linear or sinuous. Flowers monoecious or dioecious, bud-like, terminal. 

 Calyptra usually mitriform and lobed or cleft at base, sometimes cucullate, not sul- 

 cate, naked and smooth. Capsule usually erect, with simple or compound annulus, 

 and simple purple peristome of 16 lanceolate flat-jointed cribrose teeth, entire or 

 more or less deeply 2 - 3-cleft. 



A genus of nearly 100 species, represented in Europe by about 40 species, and in the United 

 States by 25, of which 15 are also European. 



§ 1. Capside depressed-.yilirriral, imniersed, erect: calyptra large, cucidlate : 

 operculum fldf, jicrsisfcnt on the columella: leaves not setosely tipped. — 

 ScouLERiA. (tScuuleria, Hook.) 



1. Gr. Scouleri, Muell. Aquatic : stems loosely cespitose, dichotomously 

 branched, 3 to 5 inches long, flexuose, black : leaves firm, crowded, recurved, 

 broadly lanceolate, dark green, carinate, serrate, minutely punctate, the margin 

 thickened : calyptra brown, obtusish : capsule very shortly pedicelled, deep brown, 

 shining, somewhat flattened, at length much depressed ; operculum umbonate : peri- 

 stome reddish yellow, reflexed, the short teeth more or less bifid at the apex. — 

 Syn. ii. 654. Scoideria aquatica, Hook. Bot. Misc. i. 33, t. 18 ; Schwaegr. Suppl. 

 t. 315. 



On rocks in Merced River near Clark's {Bolandcr) ; in Columbia River {Druvimond, Lyall) ; 

 Observatory Inlet, in running water, Scolder. 



§ 2. Capsule ovate or sidjglohose, immersed on a short erect pedicel: calyptra 

 mitriform, not reaching the edge of the depressed very shortly rostellate 

 operculum,, which falls away with the columella : only the upper leaves 

 setosely tijjpecl. — Schistidium. 



2. G-. conferta, Funk. In compact tufts, deep green above, blackish below : 

 leaves ovate- or oblong-lanceolate, the margin reflexed below and slightly thickened 

 above ; seta remotely denticulate : calyptra minute, 5-lobed at base : capsule ovate- 

 globose, brown, thin, with acutely apiculate operculum, and a deep orange peristome, 

 the teeth short-lanceolate, subentire and much perforated. — Schistidiiun confertum, 

 Bruch & Schimp. Bryol. Eur. t. 232. 



On Monte Diablo {Bolandcr) ; in canons near Green Valley {Brewer) ; West Humboldt Moun- 

 tains, Nevada, and the Uintas ( Watson) ; noi'thern Atlantic States, Europe, and Abyssinia. 



3. Gr. apocarpa, Hedw. More loosely tufted, f to 1 inch high or more : leaves 

 spreading, erect wlien dry, lanceolate, witli ajipressed-recurved margins, toothed at 

 the apex ; areolation toward the base narrow and sinuous ; perichtctial leaves broader 

 and thinner : capsule larger, ovate, firmer and opaque, red, long-apiculate : teeth 

 larger, deep purple, sometimes perforated, widely spreading when dry. — Schist idium 

 apocarpum, Bruch & Schimp. 1. c, t. 233, 234 ; Wilson, Bryol. Brit. t. 13; Sulliv. 

 in Grav's Man. 2 ed. t. 2. 



