— 9— 
THE MOSSES OF WASHINGTON COUNTY, PENNSYLVANIA^ 
N. M. Grier 
Some years ago the Herbarium of Washington and Jefferson College was 
enriched by the presentation of a collection of mosses made by Professors A. 
Linn and A. Simonton, then of the Faculty. Included in the gift were repre- 
sentative species of the mosses of Washington County, Pa. Professors Linn and 
Simonton published very little of their extended observations, but circulated among 
their friends a printed preliminary list of the mosses found in this region. 
A co-author of this list, Professor J. S. Simonton, Emeritus, Washington and 
Jefferson College, before his death gave me permission to revise it and place it in 
publication.^ This was especially desirable both on account of developments in 
nomenclature and because mistakes in identification and locality in the original 
list had evidently been copied in Porter's Catalogue,^ and from thence into Jenn- 
ings' Manual of the Mosses of Western Pennsylvania. 
Revision has been accomplished with the aid of Jennings' Manual,"* following 
in general the same taxonomic standard — that of Warnstosf, Ruhland and Bro- 
as given in Engler and Prantl's Die Natuerlichen Pflanzenfamilien, Teil I, Abte- 
ilung in. While Professors Linn and Simonton rarely collected in the same lo- 
calities of Washington County as did Dr. Jennings, the latter found many species 
which they did. The species starred (*) in the following list represent those pub- 
lished by Jennings alone as occurring in Washington County; the other species 
listed are substantiated by specimens in the Herbarium of the College. 
ORDER BRYALES 
DiCRANACEAE 
Pleuridium suhulaium (Huds.) Rabenh. 
Pleuridium aliernifolium (Dicks., Kaulf.) Rabenh. 
Ditrichum pallidum (Schreb.) Hampe. 
Ceratodon purpureus (L.) Brid. 
Dicranella heteromalla (Dill.) Schimp. 
Dicranella varia (Hedw.) Schimp. 
Dicranum undulatum Ehrh. 
Dicranum scoparium (L.) Hedw. 
Dicranum flagellare Hedw. 
Dicranum longifolium Ehrh. 
^ Contribution No. 72 (E. Linton and N. M. Grier), from the Biological Laboratory, Wash- 
ington and Jetferson College. 
^ James Snodgrass Simonton was born in Dauphin County, Pennsylvania March 20, 1829. 
He was educated at the Harrisburg Academy and at Princeton, graduating with the class of 1852. 
After teaching in the South he graduated from Princeton Theological Seminary in 1857, following 
which he traveled for three years in South America and Europe. In 1868 he joined the faculty 
of Washington and Jefferson College, becoming Professor of the French Language and Literature. 
He retired from the faculth in 1900, and was made Emeritus Professor by the Trustees. Pro- 
fessor Simonton was a teacher of unusual ability and a man of pleasant personality and high 
scholarship. His death occured on December 27, 192 1. 
^ Catalogue of the Bryophyta and Pteridophyta found in Pennsylvania. Porter, T. C. 1904. 
■* Manual of Mosses of Western Pennsylvania. Jennings, O. E. 1913. 
