<U. ®Gp0trt£n©M (3gri©MltMre,>^- 
Washington, D. G., I^iarch 19th, 1890. 
Dr.Sereno Watson, 
Cambridge , Mass . 
Dear Sir: 
I mail you to-day, for the Harvard University Herbarium 
a set of 54 species of mosses collected in California by Bolander. 
I shall be glad to get if possible a set of Wright's Cuban moss- 
es, whenever they are worked up, for the National Herbarium. 
Yours truly. 
