364 MUSCI. J)unmum. 



o1)soletely striate, becoming sulfate, redtlish brown and sliining, with an annuhis of 

 2 rows of cells; operculum curved, attenuate-subulate: teeth small, incurved when 

 dry. — Spec. 128, t. 34 ; Bruch &, Schimp. 1. c, t. GO; Wilson, 1. c, t. 18. 



IJorders of streamlets at foot of Mount Dana, at 8,000 to 10,000 feet altitude {Buhuuhi) ■ Oal- 

 ton Mountains (I.iiaJl); Itocky Mountains {Druinmuud) ; ^Vllite iMounlains, Kew Hanipshire, 

 and in alpine or subalpine loealities in Europe. 



4. D. heteromallum, Iledw. 8t)nu)wliat larger, the simple or 2-parted stems 

 densely crowded : leaves bright green with a silky lustre, secund and somewhat 

 falcate, lanceolate-setaceous, the ape.\ denticulate or nearly entire, the costa not 

 excurrent : capsule nodding or suberect upon a yellowish pedicel, obovate-oblong, 

 slightly curved,. obsoletely striate, becoming plicate, with a very narrow annulus ; 

 operculum subidate : teeth bilid or ii-clcft. — Muse. Frond, i. G8, t. 2G ; Engl. 

 Bot. t. 1272; Bruch & Schimp, 1. c, t. G2 ; ^Vilson, 1. c, t. 18. 



On ditch-bides in a bog near h'edwood City (Bvlandcr) ; Cascade Mountains, LijnJl. Very com- 

 mon in the Atlantic States and througliout Euiope. 



D. ScilKEBEKi, Swartz. Frond about half an incli lii-^li or less, with squavrosely spreading lanceo- 

 late-subulate carinate leaves im-gulaily or obsolftdy (h'nticulatc toward the apex, and tiie nodding 

 capsule not striate and witiiout annulus. — llcdw. Sj)ec. 14-1, t. '6'A ; Wil.ion, 1. c, t. 39 ; Brueli 

 k fcscliimp. 1. c, t. 53. Near I'oitland, Oregon, (Xcoiiis) ; also Euroiiean. 



D. cuispu.M, Hedw., found by Lijall in the (ialton Mountains, is niona'cious, with very flexuous 

 divaricately spreading long-subulate leaves, minutely toothed at the ajiex, and tiie erect cajjsulc 

 obovate or ovate, striate and at length sulcate, with very narrow annulus ; o])ercuhun crenulate at 

 base. — Muse. Frond, ii. <J1, t. 33 ; Ihueh X: Schimp. l". c, t. 55 ; Wilson, 1. c, t. 17. 



* * * Mostlif lanje and showy^ rooting at base or often the ivhole stem tomentose 

 with Jine rhit'oids: leaves rare!// papillose; areolation linear-ohlonfj, very 

 narrow at base, at the basal angles quadrate, enlarged or inflated, yellowish 

 and hyaline: our species dioecious. — § Dicuanum proper, 

 •t- Capsule erect, regular. 



5. D. StriCtum, Schleich. Den-sely cespitos(!, jiale or yellowish-green : stems 

 tomentose : leaves erect-spreading, rather rigid and Iragile, lauce.-subulate, the cells 

 at the angles much dilated and orange-colored: capsule soft and pale, ovate-elongated, 

 with very narrow annulus : teeth irregularly bilid, redilish orange. — Schwaegr. 

 Supph i. 188, t. 43; Bruch & Schimp. 1. c, t. GG. 



On coniferous trees at Devil's Canon, Forest Hill (Bolundcr) ; Fort Colville, "Washington Ter- 

 ritory, Lya/f. Also Euroi)ean. 



D. ALBICANS, Bruch & Schimp. (Bryol. Eur. t. 73), also of this group, was collected by 

 D'juglas on the western coast. It may be known by its strict or suhfalcate narrowly lanceolate 

 leaves, with a very broad costa and strongly incurved margins, yellowish-green, becoming whitish 

 when dry, the basal angles thin and loosely areolate : capsule oblong or long-cylindrical ; teeth 

 large, cleft to below the middle. On the ground, maturing fruit in the autumn ; in Europe and 

 the Caucasus, aliune or subalpine. 



-1- -i- Capsule nodding, incurved. 



6. D. fuscescens, Turner. CespitosG ; stems covered with dense yellow 

 tomentum : leaves crowded at the summit, secund and flexuous, lanceolate-subulate, 

 serrate at the apex, deep or pale green, often brownish, the basal cells all dilated : 

 calyptra white : capsule broad-ovate, striate, sulcate when dry ; annulus very 

 narrow; operculum with a very long curved beak: teeth jnirple, 2 - 3-cleft. — 

 Muse. Hibern. 60, t. 5; Engl Bot. t. 1597; Wilson, 1. c, t. 18. D. congestnm, 

 Bridel ; Bruch & Schimp. 1. c, t. 77. 



In the redwoods {7?o/r/ «(/«•) ; Spokane River, Oregon (Pidrriufi) ; Oalton Mountains, /.(/«//. 

 Common in the x\tlantic States, and in Europe on sliaih'd rocks in the mountains ; Iruiting in 

 early autunui. 



7. D. SCOparium, lledw. Loosely cespitose ; stems 2 to 4 inches high, with 

 white or rusty tomentum : leaves secund, falcate, rarely strict, linear-subidate, 

 sharply serrate, the costa sulcate on the back and toothed toward the api;x, the basid 



