OF WESTERN PENNSYLVANIA ISS 



Cosmopolitan, common on dry earth, crevices of brick 

 pavements and walls, soil-covered rocks, etc. 



Allegheny : Brick pavement, Pittsburgh, October 12, 



1907, Carnot, October 11, 1908, and on old 

 camp-site, Wildwood Hollow, November 



19, 1908. O. E. J. 



Beaver : Roadside, near Smith's Ferry, October 1, 



1910. O. E. J. 

 Crawford : Linesville, May 12, 1908. O. E. J. 



Erie : On sand-plain, Presque Isle, September 



20, 1906. O. E. J. 



Fayette : Cheat Haven, September 3-6, 1910. O. 



E.J. 

 Huntingdon : Near Union Furnace, July 21, 1908. O. 



E.J. 

 McKean : Bennett Brook, March 4, 1894. D. A. B. 



Westmoreland: Saunders, June 21, 1907. O. E. J. and G. 



K. T. ; Mellon's summer home. Laurel Hill 



Alts., New Florence, September 8-11, 1907. 



O. E. J. (Figured). 



9. Bryum capillare [Linnaeus] Hedwig. 



(Mnium capillare Linnaeus). 



(Plate XX) 



Rather densely cespitose, soft, light green: stems low, in 

 our specimen about 5 mm. high, reddish below, radiculose at 

 base, erect, rather stout, sometimes branching at base: leaves 

 rather dense, spreading, not forming a very distinct comal 

 tuft, soft, widely obovate-spatulate or rounded with a narrow- 

 ly oblong base, the apex abruptly acuminate, margins plane; 

 costa rather wide, reddish at base, in the lower leaves and 

 younger plants ending below the apex but in upper leaves of 

 older plants excurrent-acuminate to piliferous ; leaf-cells rhom- 

 boid-hexagonal, thin-walled, the marginal in one to several 

 rows elongated and narrow, forming a rather indistinct border, 

 the upper marginal projecting to form low denticulations, the 

 basal parenchymatous, rectangular, those near the costa in 

 the middle of the leaf more or less inflated : seta rather long ; 

 capsule rather large (about 5 mm.) with a distinct neck com- 

 prising about one-third the length of the capsule, which is sub- 

 cylindric, usually symmetric, horizontal to sub-pendulous, red- 

 dish to chestnut-color; operculum conic-apiculate, reddish- 

 orange ; peristome large, reddish : typically dioicous : mature in 

 July or August. 



On leaf-mould and loamy soil in woods, often on bases 

 of trees and on ledges, — almost cosmopolitan. 



