CATALOGUE 
OF THE 
BRYOPHYTA 
(Hepatics, Anthocerotes and Mosses) 
AND 
PTERIDOPHYTA 
(Ferns and Fern-allies) 
FOUND IN 
PENNSYLVANIA. 
BY 
THOMAS CONRAD PORTER, D.D., LL. D. 
BOSTON, U.S.A. 
GINN & COMPANY, PUBLISHERS 
1904 
