OF WESTERN PENNSYLVANIA 



193 



1. Pogonatum pennsylvanicum (Hedwig) Paris. 

 (Polytrichum pensilvanicuin Hedwig; Pogonatum hrevicaule 

 Beauvois; P. teiiitc E. G. Britton). 



(Plate XXVIII) 



Plants scattered on a green felt-like persistent protonema 

 which covers the moist, bare clay : stems very short, usually 

 about 1-2 mm. long ; leaves lanceolate-subulate, the lower 

 shorter and more ovate, narrowing abruptly to an acuminate 

 apex, margins serrulate in the upper half ; upper leaves lanceo- 

 late with a long-acumiiiate, serrulate apex, appressed or some- 

 what spreading ; lamellae 5 or 6 cells high, terminal cell orbicu- 

 lar to ovoid in cross-section, smooth : seta slender, smooth, 

 yellowish to reddish ; calyptra light yellow, very hairy and 

 more or less shaggy, completely covering the capsule; capsule 

 erect, symmetric, long cylindric, minutely papillose, slightly 

 or not at all constricted below the lid, yellowish to reddish, 

 about 4 mm.XO-8 mm.; lid obtuse to truncate, abruptly tipped 

 with a beak about 0.4 mm. long ; spores maturing in our region 

 about November. 



A common moss on bare clay banks, especially if some- 

 what moist and shaded, from Nova Scotia to Missouri and 

 south to Alabama. Common in our region. 



Allegheny : Ten localities, different dates; O. E. J. 

 Darlington Hollow, October 12, 1908. O. 

 E. J. (Figured). Coraopolis, September 

 4, 1905, and Power's Run, September 14, 

 1905. O. E. J. and G. E. K.; Wildwood 

 Road, March 29, 1908. O. E. J. and 

 G. K. J. 

 Armstrong : Kittanning, October 21, 1905; West Kit- 

 tanning, September 27, 1909. O. E. J. 

 and G. K. J. 

 Beaver : Beaver Falls, May 11, 1907, Smith's 



Ferry, along Ohio River bank, October 

 1, 1910. O. E. J. 

 Center : On red clay, near Scotia, September 22, 



1909. O. E. J. 

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



Fayette : Ohio Pyle, May 30, 1908. O. E. J. ; Ohio 



Pyle, September 1-3, 1906, and Cheat 

 Haven, September 3-6, 1910. O. E. J. and 

 G. K. J. Ohio Pyle, September 10, 1905. 

 O. E. J. and G. E. K. 

 McKean : Quintuple Ridge, September 4, 1898. D. 



A. B. ; Kane, September 5, 1909. O. E. J. 

 Washington : Charleroi, October 14, 1905. O. E. J. and 

 G. E. K. ; along north branch of Maple 



