OF WESTERN PENNSYLVANIA 



267 



Allegheny 



A. serpeiis, the teeth basally confluent, dorsally cross-striolate 

 below, hyaline-papillose above, strongly and closely trabecu- 

 late; the segments about as long, slightly carinately cleft, the 

 basal membrane about two-fifths as high, the cilia 1 or 2, 

 nodose to shortly appendiculate ; lid conic-acute ; spores about 

 .012-018 mm., slightly papillose, medium-walled, mature in late 

 spring: autoicous. 



On bases of trees, soil, rocks, rotting wood, etc., in moist 

 woods; Europe, and, in North America, from Canada to the 

 Gulf of Mexico. Very common in our region. 



: Wildwood Road Hollow, November 19, 

 1908. O. E. J. and G. K. J.; on rocks. 

 Power's Run, May 10, 1905; Wildwood 

 Road Hollow, June 6, 1908 ; Fern Hollow, 

 Pittsburgh, June 18, 1907, and Guyasuta 

 Hollow, November 9, 1908. O. E. J.; 

 Kennywood, May 3, 1902, and Moon 

 Township May 18, 1902. J. A. S. 

 : Beaver Falls, May 14, 1907. O. E. J. 

 : On base of Crataegus punctata, Crider's 



Corners, December 29, 1908. O. E. J. 

 : Linesville, June 11-12, 1907, and May 12, 



1908. O. E. J. 

 : Presque Isle, June 8-9, 1906. O. E. J. 

 : Four miles south of Ohio Pyle, September 

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

 tember 1-3, 1907; Ohio Pyle, May 30-31, 

 and July 4, 1908. O. E. J. 

 : On log, New Castle. Miss Susan Gageby, 



1906. 

 : Ursina, May 12, 1905. O. E. J. 

 : Hanlin, on wet log. May 21, 1908. 

 O. E. J. 



Laurelville, May 30-31, 1903. J. A. S.; 

 "Shades," near Blackburn, June 13, 1908, 

 Hillside, May 22, 1909, and Garrett Farm, 

 near Trafiford, August 21, 1910. O. E. J. ; 

 slope of Chestnut Ridge above Hillside, 

 September 16-17, 1909. O. E. J. and G. 

 K.J. (Figured). 



3. Amblystegium crthocladon (Beauvois) Jaeger. 

 (Hypnuin orthocladon Beauvois ; A. varium var. orthocladon 

 Husnot). 



(Plate XXXVH) 



Rather dark-green, sometimes olive-green, rather stiff 

 when dry, compactly tufted: stems irregularly branching, the 

 branches of plants in the denser tufts often erect, usually less 



Beaver 

 Butler 



Crawford 



Erie 

 Fayette 



Lawrence 



Somerset 

 Washington 



Westmoreland 



