^Q2 MUSCI. Catharinea. 



1. C. Callibryon, Ehrh. Stems erect, usually simple, 1 or 2 inches high ; in- 

 novations iirnn suliterranean stolons : leaves elongated ligulate-lanceolate, the undula- 

 tions hispid beneath and the narrow yellow border spinulose-serrate, the costa spinose 

 toward the apex and bearing 2 to G narrow lamellaj : fertile flower terminal upon 

 the prolongation of the axis of a male flower, 1 - 3-fruited : capsule long-cylindric, 

 straight or arcuate, brownish red, the long-beaked operculum little shorter. — Beitr. 

 i. 189. Atrichum undulatum, Beauv. • Bruch & Schimp. Bryol. Eur. t. 410 ; AVilson, 

 Bryol. Brit. t. 10; Berkeley, Brit. Moss. t. 19, flg. 4. Polytricimm undulatum, 

 Hedw. Muse. Frond, i. 43, t. 16, 17; Engl. Bot. t. 1220. 



At Mission Dolores (Bolandcr) ; Port Discovery and Fort Nisqually, Washington Territory 

 {Pickering) ; Fort Colville {Lyall) ; in the Atlantic States and Europe. 



2. C. angUStata, Brid. More slender than the last, with narrower more closely 

 areolate leavt-s serrate only at the apex, the lamellae more numerous : male and 

 female flowers in separate tufts : capsule narrower, more erect, purple ; operculum 

 dark purple, with a shorter beak. - — Atrichum angustatxim, Bruch & Schimp. 1. c, 

 t. 411 ; SuUiv. in Gray's Man. 2 ed. t. 3. Polytricimm angxistatum, Hook. Muse. 

 Exot. t. 50. 



On stream-banks, Santa Cruz ]\Iountains {Brcxvcr) ; common in the Atlantic States and in 

 Europe. 



40. OLIGOTRICHUM, DC. 



With the habit of Catharinea (to which it is nearly allied), but smaller and more 



rigid. Leaves linear-lanceolate, remotely serrulate, not bordered, the dilated costa 



bearing numerous lamellae. Calyptra sparingly villous with erect hairs. Capsule 



erect, long-pedicelled, ovate-oblong, terete or nearly so ; operculum convex-conic, 



acuminate or long-beaked. Peristome of Catharinea. 



About a dozen widely scattered species are known, of which one is peculiar to Europe and two 

 to North America. This genus is united with Catharinea by ilueller, as a section ; both genera 

 were originally made upon the same species. 



1. O. Lyallii, Lindb. Stout, cespitose, yellowish brown ; stems 2 inches high 

 or more, naked at base, fastigiately branched at the middle, very leafy above : leaves 

 spreading from a broad clasping base, covered above with lamellte, the incurved 

 margin serrate from the middle to the apex ; inner perichtetial leaves convolute- 

 ovate, shortly acuminate : calyptra fugacious : capsule oblong, somewhat contracted 

 above and biplicate, at length rugose ; operculum subulate-beaked. — Polytrich. 

 102 ; Sulliv. Icon. INIusc. Suppl. 56, t. 40. Polytrickadeljyhus Lyallii, Mitten, Journ. 

 Linn. Soc. viii. 49 ; Sulliv. k Lesq. Muse. Am.-Bor. Exsicc. 2 ed. n. 322. 



On Mount Dana, in Yosemite Valley, and around Clear Lake {Bolander) ; Clover Mountains, 

 Nevada ( Watson) ; Colorado {Hall) ; British Columbia, Lyall. 



41. POGONATUM, Beauv. 



Calyptra cucullate, covered by a dense coating of soft hairs attached to its apex 

 and nearly or quite covering the capsule. Otherwise as Oiigotrichum. 



Some 30 or 40 species are referred to this genus, many of them South American. Seven species 

 are found in North America, two of which are also European. 



1. P. alpinum, Bridel. Loosely and irregularly cespitose; stems much elon- 

 gated, decumbent at base, fastigiately branched above : leaves linear-lanceolate, sheath- 

 ing, spreading and recurved or subsecund, dark dull green with whitish base, acutely 

 serrate, spinulose on the back ; lamellae with reddish thickened margins : capsule 

 usually cernuous, oval-oblong ; operculum small, with long oblique beak. — Bruch 

 & Schimp. Bryol. Eur. t. 418; Wilson, Brvol. Brit. t. 11. Polytrichiim alpinum, 

 Linn. ; Hedw. Spec. t. 19 ; Engl. Bot. t. 1905. 



