rottia. MUSCI. 3gj 



A genus of about 40 species, 13 European. Nearly allied to the Barhula group, witli \vliit:h it 

 is sometimes united. 



* Peristome none or rudbiientdrij. 



-I- Leaves lamellate on the iipper side of the costa, ^vJtich terminates in a long 



seta. 



1. P. cavifolia, Ehrh. Leaves erect-spreading and subimbricate, obovate-oblong, 

 strongly concave, bearing 3 or 4 membranous lamell;>3 on the costa : capsule emer- 

 gent or exserted upon a short pedicel (1 to 6 lines long), ovate to oblong ; operculum 

 rather long-beaked ; annulus none. — Eruch & Schimp. Bryol. Eur. t. 1 18 ; Wilson, 

 Bryol. Brit. t. 7. Gymnostomum ovatum, Hedvv. Muse. Frond, i. 16, t. 6, 



In ditches near Carson City ( Watson); Fort Colvilie, Washington Territory {LynU); through- 

 out Europe and in the Andes. Very variable. 



2. P. subsessilis, Bruch & Schimp. Eesembling the last : leaves obovate or 

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

 ending in a long white seta : calyptra oblique, campanulate, lobed at base : capsule 

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

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

 Muse. Am.-Bor. Exsicc. n. 92 (2 ed. n. 118). Sckistidium suhsessile, Bridel. Fka- 

 romitrium suhsessile, Schimp. Syn. Muse. Eur. 2 ed. 150. 



At Los Angeles (Bic/elow) ; near Carson City, under sage-brush ( Watson) ; from the Rocky 

 Mountains of British America to Illinois and Texas. Also in South America and in German}'-. 

 Separated generically by Schimper upon the character of the calyptra. 



-f— H— Costa naked, slightly or not at all excurrent. 



3. P. minutula, Bruch & Schimp. Stems seldom a line long : leaves spread- 

 ing, becoming reddish, ovate- or oblong-lanceolate, Avith recurved margins and the 

 red costa slightly excurrent : antheridia naked in the axils of the pericht^tium or 

 included within 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 minutulum, Schwaegr. Suppl. i. 25, t. 9. 



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



4. P. truncata, Bruch & Schimp. Stems | to 6 lines high : leaves spreailiiig, 

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

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

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

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

 Man. 2 ed. 629, t. 2; Sulliv. & Lesq. 1. c, n. 90 (2 ed. n. 116). Gymnostomum 

 truncatum, Hedw. Muse. Frond, i. 13, t. 5. 



Var. subcylindrica, Bruch & Schimp. Leaves ovate-lanceolate, the costa more 

 excurrent : capsule subcylindrica!. 



Wet meadows near Carson City ( JFatson), the variety. New England to renns3'lvania, and 

 very common throughout Central Europe. 



5. P. Heimii, Bruch & Schimp. Somewhat taller and stouter : leaves flexuose- 

 spreading, the lower remote and broadly lanceolate, the upper crowded, oblong- 

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

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

 brown, on a pedicel | 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. ; Berkeley, Brit. Moss. t. 23, fig. 3 ; Sulliv. & Lesq. 1. c, 

 u. 115. Gymnostomum Heimii, Hedw. 1. c, i. 80, t. 30. 



In diti;hes near Soda Springs on the Upper Tuolumne {Bohmdcr); in the West Humboldt 

 Mountains, Nevada, and in the Wahsatch ( IFa/son); and in the Kocky Mountains from British 

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



