MUSCI. 



o< i 



cliistor of very broad loavos filled with loiif,'-i)edicelled lentifonn i^'enimfe : femalo 

 llower.s also sometimes goiiiiuiferoiis: capsules yellowish brown, souictiines in pairs. — 

 Spec. Muse. t. 7, t\'^. 1 ; Brueh it 8chimp. JJryol. Eur. t. l*J(i ; Wilson, Bryol. Urit. 

 t. 8; SuUiv. in Gray's Manual, 2 ed. t. 2; Berkeley, Brit. jSIo.ss. t. 19, tiy. 8. 



On icilwood logs nciu- Kg lUvcv City {Bohindcr); Fort Colville (Lijall) ; fie(iiu'iit in the 

 Atlantic States, ami tliroiigliout most of the northern heniisiiheie. 



22. GRIMMIA, Ehih. 

 Perennials, growing on rocks, nsually in dense tufts or cushions, dichotouiously 

 branched. Leaves dull, in d to 8 ranks, the lower often smaller, crowtled, spreading, 

 lanceolate, the costa nsually 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 simi)le or compound annulus, 

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

 more or less deeply 2 - 3-cleft. 



A genus of nearly 100 species, rejjrcsented in Euroj)e by about 40 .species, and in the United 

 States by 2ft, of which 15 are also European. 



§ 1. Capsule depressed-spherical, immersed, erect: calyptra large, cucullate: 

 opercidum Jiat, persistent on the columella : leaves not setosebj tipped. — 

 ScouLERiA. {Scouleria, Hook.) 



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

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

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

 thickened : calyptra brown, obtnsish : cajjsule very shortly pedicelled, deep brown, 

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

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

 iSyn. ii. 054. Scouleria aquatica, Hook. Bot. Misc. i. 33, t. 18; Schwaegr. Siippl. 

 t.'315. 



On rocks in Merced IJiver near Clark's (Bolaiuler) ; in Columbia U'wi^r (Druminond, Lijall)', 

 Obs(M-vntory Inlet, in running water, Scou/cr. 



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

 mitriform., not reachinrj the ed/e of the depressed very shortly rostellate 

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

 setosely tipped. — Schistidium. 



2. Gr. COnferta, Fuidc. 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, .^-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. — Schistidium coiiferlum, 

 Bruch ,^ Schimp. Bryol. Eur. t. 232. 



On Monte YivMo {Bolandrr)\ in canons near Green Valley (Brcurr) ; West Humboldt Moun- 

 tains, Nevada, and tiie Uintas ( Watson) ; northern Atlantic States, Europe, and Abyssinia. 



3. G-. apocarpa, Hedw. ]\Iore loosely tufted, \ to 1 inch high or more : leaves 

 spreading, erect when dry, lanceolate, with appressed-recurved margins, toothed at 

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

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

 larger, <leep purple, sometimes perforated, widely spreading when dry. — Schistidium 

 apocarpitm, iirueh .^: Scliinq). 1. c, t. 233, 231 ; Wilson, Bryol. Brit. t. 13; Sulliv. 

 in (Irav's Man. 2 cd. t. 2. 



