OF WESTERN PENNSYLVANIA 141 



1. Webera elongata [Hedwig] Schwaegrichen. 

 (Pohlia elongata Hedwig). 



Gregarious to cespitose, bright pale green : stems erect, 

 up to 2 cm. high, branching towards base; leaves crowded and 

 larger in the comal tufts, lanceolate, erect-spreading, thin, the 

 margin recurved below, the apex gradually narrowed, serrate ; 

 costa brownish, vanishing below or at the apex; leaf-cells 

 narrow, linear-rhomboidal and vermicular above, hexagonal- 

 rectangular below: seta long, slender, 2-4.5 cm. high; capsule 

 sub-erect to horizontal, narrowly elliptic, pale, 2-5.5 mm. 

 long, the neck slender and longer than the rest of the capsule, 

 when dry and empty the capsule constricted below the mouth ; 

 operculum conic-acuminate or acutely rostellate ; outer peri- 

 stome yellowish, the inner with a basal membrane about one- 

 third as high as the teeth ; cilia two, more or less well-de^ 

 V eloped but always short and never appendiculate : paroicous ; 

 antheridia in pairs in axils of upper leaves : mature in August. 



On earth and among rocks, in crevices, etc., where moist, 

 usually in the mountains. Europe, northern Africa, Asia, 

 North America from Greenland to the northern United States 

 and Colorado. Rare in our range. We have seen no speci- 

 mens from Pennsylvania, but it is reported as follows : 



McKean : Bradford. (Porter's Catalogue). 



2. Webera cruda [Linnaeus] Schwaegrichen. 

 (Pohlia cruda Lindberg). 



Robust, up to 6 or 7 cm. high, glaucous green and shining 

 above, brownish below : stems red, simple, cespitose ; the leaves 

 helow ovate, becoming linear-lanceolate in the comal tuft, 

 erect-spreading, serrate, towards the moderately acute apex, 

 margin plane, rather rigid ; costa reddish at base, not reaching 

 apex; leaf-cells linear-prosenchymatous above, larger and rec- 

 tangular at base, where often reddish : seta long ; capsule ob- 

 long, with inconspicuous neck, often unsymmetric, mostly 

 horizontal, castaneous or red-brown, when dry and empty 

 ventricose at base and constricted at the mouth ; operculum 

 conic-apiculate ; peristome yellowish, basal membrane one- 

 third as high as teeth, cilia two or three, well-developed ; usual- 

 ly autoicous, sometimes synoicous or dioicous: soores mature 

 in summer. 



On shaded earth, clefts in rocks, etc., usually in, mountain- 

 ous regions. Cosmopolitan but local in its distribution. In 

 our region rare, being unknown from Western Pennsylvania, 

 but reported from the eastern part of Pennsylvania and from 

 Painesville, Ohio. 



