rottia. MUSCI. 361 



A goiius ofjilumt -10 spocii's, 13 I'.iiropoaii. Nraily iillicil to tlie Jinrlmln {^loiiis with which it 

 is sniiietiiiics united. 



* Peristome vone or radlinentarij. 



•t- Leaves lamellate on the ujijyer side of the costa, which terminates in a long 



seta. 



1. P. cavifolia, Klnh. Leaves eroct-sproading and subiinbricate, obovate-oblong, 

 strongly concave, bearing 3 or 4 membranous lamelhe on the costa : capsule emer- 

 gent or exserted upon a short pedicel (1 to G lines long), ovate to oblong ; operculum 

 rather long-beaked; annulus none. — J'rucli & Schinip. 15ryol. Eur. t. 118; Wilson, 

 Bryol. Brit. t. 7. Gi/mnostomum ovatiun, Hedw. Muse. Frond, i. IG, t. G. 



In ditches iiciir Carson Q'lty (IVatson); Fort Colville, Washington Teiiitory (L)jall)\i\\\o\\^\- 

 out Europe and in the Andes. Very variable. 



2. P. subsessilis, Brucli Sc Schimp. Besembling the last : leaves obovate or 

 obovate-oblong, the costa bearing 2 to 4 thickened or membranaceous lamellae and 

 ending in a long white seta : calyptra oblitpie, canipanulate, lobed at base : capsule 

 immersed upon a short straight pedicel, subglobose with a large llattened-convex 

 rostellate operculum and very broad mouth. — Bryol. Eur. t. 117; Sulliv. & Lesq. 

 Muse. Am.-Bor. Exsicc. n. 92 (2 ed. n. 118). Schistidium subsessile, Bridel. Fha- 

 romitriuni subsessile, Schimp. Syn. i\[usc. Eur. 2 ed. 150. 



At Los Anj:;elcs (Biijcloir) ; near Carson City, under sage-brush ( IVnfson) ; from the Rocky 

 Mountains of British America to Illinois and Texas. Also in South America and in Germany. 

 Separated generically by Schiniper upon the character of the calyptra. 



■t- -)— Costa nahed, slightly or not at all cxcurrcnt. 



3. P. minutula, Bruch Sc Schimi). 8tems seldom a line long : leaves spread- 

 ing, becoming reddish, ovate- or obloiig-lanceolato, with recurved margins and the 

 red costa slightly cxcurrcnt : antheridia naked in the axils of the perichnetium or 

 included witliin one or two perigonial leaves : capsule minute, on a reddish pedicel 

 a line or two long, truncate-ovate, with a large obtusely conical operculum. — Bryol. 

 Eur. t. 119; Wilson, 1. c. ; Sulliv. & Lesq. 1. c, n. 91 (2 ed. n. 117). Gymnosto- 

 mum mimitulnm, Schwaegr. Suppl. i. 25, t. 9. 



At Los Angeles (Bigelow); through Europe and in Northern Africa. 



4. P. truncata, Bruch k Schini)). Stems i^ to G lines high : leaves spreading, 

 obovate-oblong or suljspatulate, shortly acuminate and usually mucronate with the 

 excurrent costa, concave at base and carinate above, the margins ilat : capsule trun- 

 cate-obovate, with an obliquely beaked llat-convex operculum deciduous with the 

 upper portion of the columella. — Bryol. Eur. t. 120 ; Wilson, 1. c. ; Sulliv. in Gray's 

 INlan. 2 ed. G29, t. 2; Sulliv. & Lesq. 1. c, n. 90 (2 ed. n. IIG). G ymnostom.nm 

 tntncatum, Flodw. Muse. Frond, i. 13, t. 5. 



Var. subcylindrica, IJruch Si Schimp. Leaves ovate-lanceolate, the costa more 

 excurrent : capsule subcylindrical. 



Wet meadows near Carson City {IFntson), the variety. New England to Pennsylvania, and 

 very common throughout Central Europe. 



5. P. Heimii, Druch X- Schimp. Somewhat taller and stouter: leaves flexuose- 

 spreading, the lower remote and broadly lanceolate, the upi)er crowded, oblong- 

 lanceolate, acute or acuminate, serrate at the apex, with flat margins and the reddish 

 costa ceasing at or below the apex ; inflorescence polygamous : capsule reddish 

 brown, on a pedicel h to 1 inch long or less, truncate-obovate or oblong {'operculum 

 flat-convex, obliquely long-beaked, remaining attached to the columella. — Bryol. 

 Eur. t. 124 ; Wilson, 1. c. ; P.erkeley, Brit. ^[oss. t. 23, fig. 3 ; Sulliv. & Lesq. 1. c, 

 n. 115. G ymnostovDim lleimii, Hedw. 1. c, i. 80, t. 30. 



In ditches near Soda Springs on the Upper Tuolumne (Bolnndrr); in the West Humlmldt 

 Mountains, Nevada, and in tlie Wahsatch ( JVntsmi); and in the Hocky Mountains from British 

 America to Colorado. Also in the Andes to Cape Horn, and in Eurojw. 



