218 Rhodora [NOVEMBER 
On that date I went to the tree and secured specimens. The local 
flora committee received reports of this species from several scattered 
stations as far south as Chestnut Hill, Brookline, so this new station 
extends the range several miles southward.— CLARENCE H. KNowr- 
TON, Hingham, Massachusetts. 
Nore ON JUNIPERUS HORIZONTALIS AND J. VIRGINIANA.— While 
engaged recently in the preparation of a key to the New England 
junipers, I noticed that besides the differences between Juniperus 
horizontalis Moench and J. virginiana L. emphasized in Gray's Manual, 
other characters of some value in the separation of these species 
are afforded by the fruit. In the Gray Herbarium material, which 
I examined with Prof. Fernald, it was found that the fruits of J. 
horizontalis contained generally four seeds, rarely three or five, when 
mature chestnut-brown and roughened. J. virginiana, on the other 
hand, had fruits with one or (usually) two seeds, very rarely three, 
rather pale ashy-brown and smooth at maturity. The representation 
of mature-fruited J. virginiana at hand being rather scanty, I dis- 
sected 66 of the berries, collected in Stoughton, finding 52 with but 
one well-developed seed each, and only 14 with two, reversing the 
proportions we had been led to expect from the study of the Herbarium 
material. This latter, however, coming as it does from widely sepa- 
rated localities, probably more truly represents the normal numerical 
tendencies of the J. virginiana fruits — Stoney F. BLAKE, Stoughton, 
Massachusetts. 
THE NORTH AMERICAN SPECIES or PanicumM.— Possibly no mono- 
graph of similar scope in American taxonomic literature represents 
a more intensive and critical study than Hitchcock and Chase’s 
treatment of Panicum,’ which has just appeared from the Govern- 
ment Printing Office. By extensive field-work, continued through 
several seasons, both authors have obtained first-hand knowledge of 
nearly every species which reaches the United States, and of many 
Mexican and West Indian species. Their field-work has been supple- 
mented by green-house cultures, in order to establish beyond doubt 
the identity of the vernal and autumnal phases of many species, and 
by a thorough study of most of the Panicum material in European 
L 
i The North American Species of Panicum, by A. S. Hitchcock and Agnes Chase. . 
Contributions from the United States National Herbarium, XV, Washington, 22.0ct. 
1910. 
