66 Rhodora [APRIL 
Specimens of the small white and small black Hygrophorus, of 
Amanita cariosa (Fr.) Gill., and of Tricholoma ustale Fr. were given 
to Dr. W. G. Farlow of Cambridge, Massachusetts. 
BROOKLINE, MASSACHUSETTS. 
THE RECENT TREATMENT OF PANICUM COMPARED 
WITH THAT.IN GRAY’S MANUAL. 
WALTER DEANE. 
Durine the revision of the genus Panicum in my Herbarium I 
have been making a most interesting comparison between the species 
and varieties treated in Gray’s Manual, 7th ed., 1908 (in which the 
Gramineae were revised by Prof. A. S. Hitchcock) and the correspond- 
ing forms from the same geographic area as treated in the recent 
work by Prof. Hitchcock and Mrs. Agnes Chase, The North American 
Species of Panicum, published in Washington in 1910. In the latter 
work there are some changes in synonymy, several species and one 
variety have been added, and a few other changes have been made. 
These have been remarkably few considering the number of species 
involved and the extent of the area included. Careful search will 
doubtless disclose other species within our limits. 
In the Gray's Manual there are 74 species (P. tenue Muhl. not 
being numbered) and 4 varieties of Panicum. In The North Ameri- 
can Species of Panicum there are 91 species and 5 varieties recorded 
from the same region. 
Mrs. Chase has suggested to me that the readers of Ruopora might 
be interested in these changes. J append a list, which has been kindly 
examined by Prof. Hitchcock and Mrs. Chase, including all addi- 
tions, changes in synonymy, elimination of species, etc. Each spe- 
cies or variety is preceded by its number as occurring in Hitchcock 
and Chase’s work. After additional species the Manual stations 
are given in which they occur, and also the natural group in which 
the species belongs. 
