OF WESTERN" PENNSYLVANIA 137 



Fayette : Ohio Pyle. June 14, 1908. O. E. J. and 



September 1-3, 1906, and Cheat Haven, 



September 3-6. 1910. O. E. I. and 

 G. K. I. 



( ireene 



Huntingdon 



Lawrence 



Mercer 



Somerset 

 Washinton 



Waynesburg, May 30. 1904. O. E. I. 

 Birmingham, May 17, 1904. O. E'. J. 

 New Castle, Apri'l 28, 1907. Miss Susan 

 Gaeb. 



Houston Junction, Inly 12, 1902. [. A. S. 

 Ursina, May 12, 1905.' O. E. I. 



Finleyville, July 2, 1904. G. E. K. ; Char- 



leroi," April 24/1908. O. E. J. 

 Westmoreland : I.igonier to Donegal, June 23, 1904. O. E. 



I. (Figured); New Florence, September 

 8-11, 1907. O. E. (.; Saunders Station, 

 June 21, 1907. O. E. J. and G. K. J. 



Family XIII. SCHISTOSTEGACEAE. 



This family consists of one genus only, the characters be- 

 ing as follows : 



1. SCHISTOSTEGA. Mohr. 



Dioicous: inflorescences gemmiform, terminal, paraphyses 

 none: minute and slender mosses in holes in earth, in caves, 

 etc. : annual, gregarious on an abundant persistent protonema, 

 which is more or less luminous by reflected light ; sterile stems 

 fiom the middle upwards with distichous, basally confluent 

 leaves; fertile stems with a terminal 5-seriate tuft of leaves ; 

 leaves unistratose, ecostate ; cells prosenchymatous, lax-rhom- 

 bic, sparsely chlorophyllose : seta thin, erect, almost hyaline ; 

 capsule minute, erect, symmetric, globose, without stomata, 

 annulus, or peristome ; operculum small, convex ; calyptra very 

 small and fugacious, mitrate, covering only the operculum, 

 smooth and naked ; propagation often by brood-bodies on the 

 protonema. 



One species only, in crevices and caves in non-calcareous 

 districts, in Europe, and, in North America, in New York and 

 Ontario, Rocky Mountains, British Columbia, Thompson's 

 Eedges, Ohio, and White Mountains. 



1. Schistostega pennata | Hedwig] Hooker and Taylor. 



( Gymnostomum pcnnatum Hedwig, Schistostega osmuudocca 

 Mohr. ) 

 With characters as given for the genus. 



Family XIV. BRYACEAE. 



Dioicous, autoicous. paroicous, or synoicous, sometimes 

 heteroicous ; antheridial inflorescences with paraphyses; 



