23 
Wissahickon and Pennypack Creeks, James; LANCASTER, 
Safe Harbor, Porter; WasHincton, Linn and Szmonton. 
[Grimmia conferta Bruch.] 
S. alpicola rivulare (Brid.)}—Wahlb. On rocks. LANCASTER 
and CUMBERLAND, Small. [Grimmia rivularis Brid.] 
Racomitrium Brid. 
R. aciculare (L.) Brid. On wet rocks. CARBON, Mauch 
Chunk, James; Stony Creek (fertile), Raw; CAMBRIA, 
James’ [Grimmia acicularis C. Muell.] 
R. microcarpum (Schrad.) Brid.—On wet rocks. CARBON, 
Stony Creek, Raw; PHILADELPHIA, Fairmount Park, James. 
[Grimmia microcarpa (Gmel.) Lindb. R. Sudeticum 
Br. & Sch.] 
Glyphomitrium Brid. 
[Ptychomitrium Br. & Sch.] 
G. ineurvum (Schwaegr.) E. G. Britton, n. comb.—On rocks 
and stones. NorTHAMPTON, Easton, Porter; Bethlehem, 
Rau, PHILADELPHIA and DELAWARE, James; LANCASTER, 
Conewago, Small. [Brachystelium incurvum (Schwaegt.) 
C. Muell.] 
Hedwigia Enhbrh. 
H. albicans (Web.) Lindb.—On exposed rocks. NORTHAMP- 
ton, Porter; PHILADELPHIA, James; DELAWARE (Smith’s 
Catalogue); CHESTER, (Flora Cestrica); LANCASTER, Porter. 
Common throughout the State. [A cz/ata Ehrh.] 
H. albicans leucophaea Schimp.—DavpuHin, Peter’s Moun- 
tain, C. H. Small; Huntincpon, Stone Creek, Porter, 
WESTMORELAND, James. 
