OF WESTERN PENNSYLVANIA 



313 



leaves lance-ovate to lanceolate, about 0.5-1.5 mm. long, short- 

 acuminate, otherwise similar to the stem-leaves ; median leaf- 

 cells linear-flexuose, about 12-20:1, prosenchymatous, the alar 

 inflated, rather incrassate, lai-ge, forming a quite distinct 

 auricle, bordered above by a few considerably smaller and 

 chlorophyllose cells ; costa rudimentary or none, or double and 

 short; perichaetial leaves spreading, abruptly filiform-acumi- 

 nate, the itmer nori-plicate ; paraphyllia large and numerous: 

 seta about 2.5 cm. long, lustrous, castaneous, when dry sinis- 

 trorse ; capsule lorig-cylindric, dull-castaneous, curved, sub- 

 erect to more or less inclined, about 4-6:1, urn about 2.5-3 

 ram. long, the lid conic and obliquely short-rostrate ; peris- 

 tome-teeth confliieiit at base, transversely striolate and yel- 

 lowish below, strongly trabeculate, the divisural and the dorsal 

 iamellse usually faint; segments slightly carinately cleft, be- 

 low hiore or less faintly transversely striolate-papillose, above 

 papillose, about as long as the teeth; cilia usually single and 

 shorter, sometimes two and rudimentary, or sometimes none, 

 articdiate; fepdrfes granulose, yellowish-brown, somewhat in- 

 crassate, about .015-.016 rhm., mature in late fall or winter. 



On earth, humus, rocks, rotten logs, etc., in woods; Eu- 

 rope, Asia; and, in North America, from Nova Scotia to Mon- 

 tana and southwards to the Gulf States. Very common in our 

 region. 



Allegheny : Thirteen pockets determined from various 



ravines and hollows in the county. Fig- 

 ured from specirnens from ^^'ildwood 

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

 J. arid G. K. J. 



Armstrong : Kittanning. D. R. Sumstine. 1904. 



Butler : Swampy woods near Crider's Corners, 



April 26, and December 29, 1908. O. E. J. 



Cambria : Ebensburg. T. P. James. (Porter's Cata- 



logue). 



Crawford : Pymatuning Swamp, Linesville, Alay 18, 



1905. O. E. J.; Hartstown, May 29-31, 

 1909. O. E. J. and G. K. J. 



Elk : McMinn. (Porter's Catalogue). 



Fayette : Ohio Pyle, September 1-3, 1907. O. E. J. 



and G. K. J. 



McKeari : Four localities near Bradford, 1894-1896. 



D. A. B. 



