Orlholrtchum. MUSCl. ^^3 



part foniu'd of a doulilo layer of cells : capsulo oljscurcjy S-striato, tlio calyi)tra 

 usually very liairy, and the jjeristonic-tceth erect when dry. — Brucli it Schinip. I.e., 

 t. 209 ; Fl. Dim. xv, t. 2500, lig. 2. 



^^ Oil shacletl rocks in Yosoniito Valley (Bnlnndcr) ; W. Humboldt Mountniiis, Nevada (Jrafowi) ; 

 Texas {]f'n/jht) ; also in the White Mountains, in Europe, and the-Sandwich Islands. 



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

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

 late, papillose, with revolutc margins, basal areolation rectangular : calyptra cam- 

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

 with 8 or •■ times IG orange strii' : teeth in jiairs, erect when dry ; 8 rudimentary 

 cilia sometimes present. — iMusc. Frond, ii. 102, t. 37; Lruch & Schini}). 1. c, 

 t. 210 ; Wilson, 1. c, t. 21 ; Berkeley, 1. c. lig. 5 ; Fl. Dan. t. 2G15. 



Washoe Mountains, near Carson City {Watson), a form with thicker, more jiapillose and more 

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

 Irom 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, 

 orect-spreading when dry, carinate-costato with rellexed margins, somewhat folded 

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

 very pilose : capsule immersed, oblong-obovate u[)on a short collum, i)roniinently 

 8-ribbed the whole length when dry ; ojierculum short- rostrate : teeth in pairs, pale 

 yellow, often Avith IG rudimentary cilia. — Gray's I^Ianual, 2 ed. G33, and Icon. 

 Muse. 53, t. 34; Sulliv. & Lescp Muse. Ani.-Bor. Exsicc. n. 122. 



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

 longer jtediccl, 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 (^y/rt?iffc?-); Texas and New Mexico, Wright, 

 Fcndlcr. 



T). O. 'WatSOni, James. Loosely tufted, green, pale ochre below, sparingly 

 branched, G to lU lines high: leaves rather soft and loose, long-lanceolate and 

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

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

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

 rostrate : teeth yellowish white, clos(!ly 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. 



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

 rather loose tufts, pale green or cinereous Avhen dry, brownish Ijelow, su])julaceous : 

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

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

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

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

 base, longitudinally 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, 

 Biitish Columbia, Macoun. 



* * Peristome double. 



7. O. rupestre, Schleich. Stems i-iither long, forming loose circular brownish 

 tufts, brandling : leaves spreading, soinewhat recurved, strict and rigid when dry, 

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

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

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

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



