OF WESTERN PENNSYLVANIA 145 



Westmoreland : On damp clay with Pogoimtuni, slope of 

 Chestnut Ridge, Hillside, May 22, 1909. O. 

 E.J. (Figured). 



.S. Webera annotina [Linnasus] Schwaegrichen. 

 (Pohlia annotina Lindberg). 



Loosely cespitose, light green : stems short, 1-2 cm., 

 branching with slender. stiff innovations from the base; leaves 

 below small, lanceolate, non-decurrent, the upper longer, nar- 

 row-lanceolate, acuminate, margins somewhat recurved, ser- 

 rulate at apex ; costa nearly or quite percurrent, often reddish 

 at base ; leaf-cells rather thick-walled, narrowly rhomboid, 

 small : seta red, fle.xuous ; capsule small, about 2 mm. longj 

 castaneous, the neck about as long as the rest of capsule, taper- 

 ing, the whole capsule oval-pyriform, inclined to, horizontal ; 

 annulus broad, revoluble ; operculum conic-apiculate ; mouth 

 wide; peristortie-teeth yellowish, segments widely carinately 

 gaping, cilia in pairs, articulate ; exothecial cells more or less 

 collenchymatous : the sterile stems bearing in the axils of most 

 of the leaves greenish, sub-sessile, clustered, ovate to ovoid 

 gemmae with short non-twisted points : dioicous. 



Moist, sandy soil, especially among rocks in mountains. 

 Europe, Algeria, Asia, and, in North A'merica, from Greenland 

 to British Columbia and south to New, England, Ptennsylvania', 

 and Kansas. Rare in our region. 



Beaver : Lesquereux. (Porter's Catalogue). 



6. Webera proligera (Lindberg) Kindberg. 

 (Pohlia proligera Lindberg). 



Gregarious to loosely cespitose, pale green : stenis rather 

 slender; leaves similar to those of IV. annotina but somewhat 

 I'ohger and larger ; gemmse numeroi'is in the axils of the upper 

 leaves and differing from those in W. annotina in being longer and 

 narroVver and more or less fusiform with acuminate and ofteii 

 twisted points: the capsule has a shorter neck (Dixon and Jame- 

 son's Handbook) and the exothecial cells are not collenchymatous : 

 dioicous : fruit rare. 



This sf)ecies inhabits sandy soil in moist situations, es^jecially 

 amohg rocks in mountains, as does also IV. annotina, with which 

 it has been considerably confused. It occurs in Europe, and, in 

 North America, from northern Canada and Alaska to Soiith 

 Carolina and Minnesota. It is not yet reported in Westerh 

 Pennsylvania but has been found along Lick Run iii West Vir- 

 ginia, at the southern edge of our region. 



3. MNIOBRY U M ( Schimper, ex parte) . Limpricht. 

 Dioicous, rarely polyoicous : weak to robust, loosely cespi- 

 tose ill brownish to whitish-green tufts, or gregarious : stems 



