Orthotrichum. MUSCI. 3g3 



part formed of a double layer of cells : capsule obscurely 8-striate, the calyptra 

 usually very hairy, and the peristome-teeth erect when dry. — Bruch & Schinip. 1. c, 

 t. 209 ; Fl. Dan. xv, t. 2560, tig. 2. 



On shaded rouks in Yosemite Valley {Bolander) ; W. Humboldt Mountains, Nevada ( irafeo?i) ; 

 Texas {JVri(jht) ; also in the White Mountains, in Europe, and the Sandwich Islands. 



3. O. anomalum, Hedw. Stems erect, about an inch high, subsim])le : leaves 

 rather tirm, spreading or the upper crowded and more erect, strict when dry, lanceo- 

 late, papillose, with revolute margins, basal areolatiou rectangular : culyptm cam- 

 panulate, hairy : capsule exserted on a long pedicel, ovate-oblong, reddish brown, 

 Avith 8 or sometimes 16 orange stria? : teeth in pairs, erect when dry ; 8 rudimentary 

 cilia sometimes present. — - Muse. Frond, ii. 102, t. 37 ; Bruch & Schimp. 1. c, 

 t. 210 ; Wilson, 1. c, t. 21 ; Berkeley, 1. c. tig. 5 ; Fh Dan. t. 2615. 



Washoe ]\Iountains, near Carson City ( Watson), a form with thicker, more papillose and more 

 revolute leaves, with closer areolation, and the calyptra more pilose. The typical form is found 

 from Arctic America and Greenland to Colorado and the Atlantic States ; also Europe. 



4. O. Texanum, Sulliv. Stems nearly an inch high, loosely leafy, cespitose 

 or in small brownish- or dark-green tufts : leaves linear-lanceolate, recurved-spreading, 

 erect-spreading when dry, carinate-costate with reflexed margins, somewhat folded 

 above and very minutely papillose : flowers monoecious, the male axillary : calyptra 

 very pilose : capsule immersed, oblong-obovate ui)on a short collum, prominently 

 8-ribbed the whole length when dry ; operculum short-rostrate : teeth in pairs, i)ale 

 yellow, often with 16 rudimentary cilia. — Gray's Manual, 2 ed. 633, and Icon. 

 Muse. 53, t. 34 ; Sulliv. & Lesq. Muse. Am.-Bor. Exsicc. n. 122. 



Var. globosum, Lesq. Capsule shorter, subglobose, emergent upon a somewhat 

 longer pedicel, with a brown shining calyptra; stem shorter, the leaves erect when 

 moist. — Mem. Calif. Acad. i. 17. 



Common on rocks and trees, and very variable (5yta;i(fc?-); Texas and New Mexico, Wright, 

 Fmdlcr. 



5. O. Watsoni, James. Loosely tufted, green, pale ochre below, sparingly 

 branched, G to 10 hues high: leaves rather soft and loose, long-lanceolate and 

 acute, recurved, carinate, margins revolute, covered above with 2-3-forked papilhe: 

 flowers monoecious : calyptra somewhat hairy : capsule emergent, subelliptical when 

 dry, prominently ribbed and contracted below the dilated mouth ; operculum short- 

 rostrate : teeth yellowish white, closely connate in pairs, erect-spreading when dry. 

 — Bot. King Exp. 401 ; Sulliv. Icon. Muse. Suppl. 73, t. 54. 



On damp shaded rocks, West Humboldt Mountains, Nevada, Watson. 



6. O, Jamesianum, Sulliv. Stems sparingly branched, 6 to 8 lines high, in 

 rather loose tufts, pale green or cinereous when dry, brownish below, subjulaceous : 

 leaves oblong or lanceolate-oblong, obtuse, subcarinate, papillose, the margins revolute, 

 and costa ceasing below the apex : flowers monoecious, the male axillary : calyptra 

 sparingly hairy : capsule immersed, pyriform, short-pedicelled, 8-ribbed when dry 

 and constricted below the broad mouth : teeth distinct, transversely vermiculate at 

 base, longitudhially at the apex, and circularly in the middle. — ■ Bot. King Exp. 401, 

 and Icon. Muse. SuppL 71, t. 53. 



On limestone rocks in the East Humboldt Mountains, Nevada (Watson); Fort St. James, 

 Britisli Columbia, Mucoun. 



■■:= * Peristome double. 



7. O. rupestre, Schleich. Stems rather long, forming loose circular brownisli 

 tufts, branching : leaves spreading, somewhat recurved, strict and rigid when dry, 

 lanceolate acute, deeply carinate above, with revolute or involute margins, minutely 

 papillose : calyptra campanulate, very villous with yellow hairs : capsule innnersed 

 or emergent, pyriform, pale yellow becoming brownish, faintly 8-slriate, when dry 

 scarcely contracted below the mouth : teeth rather long, pale, in pairs or at length 



