390 MUSCI. Bryum. 



t. 28; Berkeley, Brit. Moss. t. 18, fig. 3. Bryum pyri/orme, Linn. ; Hedw. Hist. 

 Muse. t. 3, fig. 13 ; Bruch & Schirnp. Bryol. Eur. t. 335 ; Fl. Dan. t. 2380, fig. 2. 



At Cajon Pass (Bigelow), Clear Lake (Bolandcr), and common in the Sierra Nevada and in the 

 mountains northward and eastward across the continent. Also frequent in Europe, Asia and 

 South America. 



33. BRYUM, Dill. 



Cespitose perennials, on the ground or rocks ; stems simple or sparingly innovat- 

 ing near the flowering apex, often with rhizoids the whole length. Leaves in 

 several ranks, the upper larger and more crowded, usually ovate or lanceolate, 

 smooth, the costa mostly percurrent or nearly so, with rather large subequal rhombic- 

 or rectangular-hexagonal areolation, usually more or less serrate. Male flowers dis- 

 coid or bud-like, with filiform paraphyses. Calyptra narrow, cucullate, fugacious, 

 smooth. Capsule long-pedicellate, solitary, pyriform or oblong, with long or rather 

 short collum, inclined or pendulous, smooth, mostly annulate ; operculum convex, 

 apiculate or shortly rostellate. Peristome double ; outer of 1 6 linear-lanceolate or 

 lanceolate teeth, with sinuous medial line and joints prominent on the inner side, 

 incurved when dry ; the inner a basal membrane, divided half-way down into cari- 

 nate processes or cilia (sometimes splitting through the keel), alternate Avith the 

 teeth, and usually with (1 to 3) interposed filiform ciliolae. 



A genus of over 200 species, of which one-half are South American and a fourth European. 

 About 45 species are found in North America. The section Wcbera, is restored to the rank of 

 a genus by Schimper in the last edition of his Synopsis. 



1. Stems simple or innovating usually at the base: leaves mostly narrowly 

 lanceolate, shining, with elongated hexagonal areolation ; costa ceasing 

 below the apex : cilioloe wanting or imperfect, or filiform and not appen- 

 diculate. WEBERA. (Webera, Hedw.) 



* Capsule narrowly pyriform with long collum : inner teeth entire or scarcely 

 fissured; ciliolce none or imperfect: flowers monoecious in n. 1. 



1. B. polymorphum, Bruch & Schimp. Loosely cespitose; stems usually 

 very short, simple or rarely branched : upper leaves crowded, spreading, oblong- 

 lanceolate, sharply serrate above, lower margins reflexed : antheridia hypogynous, 

 axillary : capsule oval-oblong, horizontal or inclined, reddish brown, with bluntly 

 conic operculum and large annulus : outer peristome reddish brown, the inner 

 yellowish, without ciliolse. Bryol. Eur. t. 344 ; Wilson, Bryol. Brit. t. 47. 

 Pohlia polymorpha, Hoppe & Hornsch. Webera polymorpha, Schimp. 



On Mount Dana (Bolandcr) ; Oregon, Hall. Throughout Europe ; a very variable species. 



B. LONGICOLLUM, Swartz, found in the Cascade Mountains of Washington Territory (Lyall), 

 is a taller deep-green species, with broader leaves, shorter collum, and a bright yellow peristome 

 with more or less developed ciliola?. 



2. B. nudicaule, Lesq. Densely cespitose, brown below, green above ; stem 

 slender, 4 or 5 lines high, nearly naked to above the middle : leaves crowded, erect, 

 ovate-lanceolate, acute, obsoletely denticulate above ; the inner perichsetial shorter 

 and denticulate, sometimes with free antheridia in the axils : capsule horizontal or 

 pendulous, usually slightly unsym metrical, brown, with depressed conical operculum 

 and compound annulus : inner peristome deeply divided, the narrow elongated teeth 

 narrowly fissured, without ciliolae. Mem. Calif. Acad. i. 21 ; Sulliv. Icon. Muse. 

 Suppl. 49, t. 34. 



On Mount Dana, at 11,000 feet altitude, Bolandcr. 



3. B. Bolanderi, Lesq. Loosely cespitose, pale green and shining ; stems 

 short, simple, leafy : lower leaves loosely imbricated, erect, lanceolate ; the upper 



