364 MUSCI. Dicraimm. 



obsoletely striate, becoming silicate, reddish brown and shining, with an annulus 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. 



Borders of streamlets at foot of Mount Dana, at 8,000 to 10,000 feet altitude (Bolandcr) ; Gal- 

 ton Mountains (Lyall); Rocky Mountains (Drummond); White Mountains, New Hampshire, 

 and in alpine or subalpine localities in Europe. 



4. D. heteromallum, Hedw. Somewhat larger, the simple or 2-parted stems 

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

 falcate, lanceolate-setaceous, the apex 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 subulate : teeth bifid or 3-cleft. Muse. Frond, i. 68, t. 26 ; Engl. 

 Bot. t. 1272; Bruch & Schimp, 1. c., t. 62 ; Wilson, 1. c., t. 18. 



On ditch-sides in a bog near Redwood City (Bolandcr) ; Cascade Mountains, Lyall. Very com- 

 mon in the Atlantic States and throughout Europe. 



D. SCHREBERI, Swartz. Frond about half an inch high or less, with squarrosely spreading lanceo- 

 late-subulate carinate leaves irregularly or obsoletely denticulate toward the apex, and the nodding 

 capsule not striate and without annulus. Hedw. Spec. 144, t. 33 ; Wilson, 1. c., t. 39 ; Bruch 

 & Schimp. 1. c., t. 53. Near Portland, Oregon, (Neviua) ; also European. 



D. CKISPUM, Hedw., found by Lyall in the Galton Mountains, is monoecious, with very flexuous 

 divaricately spreading long-subulate leaves, minutely toothed at the apex, and the erect capsule 

 obovate or ovate, striate and at length sulcate, with very narrow annulus ; opeiculum crenulate at 

 base. Muse. Frond, ii. 91, t. 33 ; Bruch & Schimp. 1. c., t. 55 ; Wilson, 1. c., t. 17. 



* * * Mostly large and showy, rooting at base or often the whole stem tomentose 

 with fine rhizoids: leaves rarely papillose; areolation linear-oblong, very 

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

 and hyaline : our species dioecious. DICRANUM proper. 



t Capsule erect, regular. 



5. D. Strictum, Schleich. Densely cespitose, pale or yellowish-green : stems 

 tomentose : leaves erect-spreading, rather rigid and fragile, lance-subulate, the cells 

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

 with very narrow annulus : teeth irregularly bifid, reddish orange. Schwaegr. 

 Suppl. i. 188, t. 43; Bruch & Schimp. 1. c., t. 66. 



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

 ritory, Lyall. Also European. 



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

 Douglas on the westeni coast. It may be known by its strict or subfalcate 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, alpine or subalpine. 



t- -i- Capsule nodding, incurved. 



6. D. fuscescens, Turner. Cespitose; 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 purple, 2 - 3-cleft. 

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

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



In the redwoods (Bolander) ; Spokane River, Oregon (Pickering) ; Galton Mountains, Li/ctfl. 

 Common in the Atlantic States, and in Europe on shaded rocks in the mountains ; fruiting in 

 early autumn. 



7. D. scoparium, Hedw. Loosely cespitose ; stems 2 to 4 inches high, with 

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

 sharply serrate, the costa sulcate on the back and toothed toward the apex, the basal 



