OF WESTERN PENNSYLVANIA 175 



spores reddish-brown, pellucid, coarsely papillose, mature in 

 May or June. 



Cosmopolitan on rocks or soil in moist and shady woods ; 

 in North America from the Arctic regions to Alabama and 

 Colorado. Common in our region. 



Allegheny : Flaugherty Run, Moon Township, Feb- 

 ruary 26, 1887. T. A. S.; Thornhill, De- 

 cember 29, 1908. O. E. J. ; Wildwood 

 Road Hollow, November 19, 1908. O. E. 

 J. and G. K. J. 



Crawford : On clayey roadside-bank, Hartstown, 



May 29-31". 1909. O. E. J. and G. K. J. 

 (Figured). 



Elk : Dent's Run, July 19, 1904. O. E. J. 



Fayette : On rock in woods, Ohio Pyle, September 



1-3, 1906. O. E. J. and G. K. J. 



McKean : Toad Hollow, Bradford, Julv 19, 1896. 



D. A. B. 



Washington r Valley of Maple Creek, Charleroi, Oc- 

 tober 13, 1905. O. E. J. and G. E. K. 



la. Bartramia pomiformis variety crispa (Swartz) Bryologia 



Europcea. 



This variety is taller and looser than the species : leaves 

 longer, more distant, when dry more crispate ; the innovations 

 are long, often longer than the seta. 



In moister or more shaded situations but with much the 

 same general distribution as the species. 



McKean : D. A. B. (Porter's Catalogue). 



2. Bartramia ithyphylla [Flaller] Hedwig. 



Densely cespitose, silky, glaucous-green or yellowish : 

 leaves close, rigidly divergent from a white, scarious, erect- 

 appressed glossy base, when dry quite straight and more or 

 less erect, the spreading lamina linear-subulate, abruptly con- 

 tracted from the obovate base, margin plane, sharply denticu- 

 late above : costa strong but not very distinct above, excurrent 

 into the denticulate subulation ; basal leaf-cells linear, 4-10:1, 

 hyaline, the median and upper papillose, obscure, about 3-6:1 : 

 seta long ; capsule similar to that of B. pomiformis, globose- 

 oblong, when dry curved and deeply furrowed ; peristome-teeth 

 reddish-brown, apically bifid or irregularly perforate; segments 

 yellowish, cleft, much shorter than the teeth : synoicous : spores 

 mature in summer. 



On moist earth or in moist fissures of rocks, mainly in 

 alpine regions, in Europe, Asia, and in Arctic and temperate 

 North America. Rare in our region. 



