1896 } ROSE AMERICANA: 19 
scattered. It is important to know whether the prickles are 
normally scattered or paired, for, in the former case it would 
make FR. Woodstt approach R. dlanda, while in the latter case it 
would approach R. pisocarpa. This observation must be made 
in the Missouri region, which appears to be the natural habitat 
of R. Woodsit. 
Watson identifies R. Maximiliana Nees as R. Woods. 1 have 
authentic specimens of that rose obtained by Prince Max. von 
Wied in the prairies on the banks of the Missouri. Apart from 
its pubescent leaflets that form shows very close affinity to &. 
Woodsti, with which it certainly seems to be identical. The 
armature of its axes very much resembles that of specimens of 
R. Woodsit to which I have alluded above, and leaves me with- 
out doubt as to the arrangement of the prickles. 
In conclusion, R. Woodsii of Lindley remains doubtful to me. 
Perhaps it constitutes a distinct species; perhaps it is but a 
variety of R. dlanda or of R. pisocarpa. In reference to &, 
Woodsii as constituted by Watson, I believe it is composed of 
heterogeneous specific elements. 
ROSA GRATISSIMA Greene. 
Mr. Greene described his R. gratissima in 1891 in his Flora 
Franciscana, and remarks that it has the look of R. Californica. 
According to Mr. Greene the prickles, which are slender and 
straight, are paired only upon the vigorous growing shoots. 
Upon comparing the descriptions of R. gratissima and R. 
Californica given by Mr. Greene, we find that the first is distin- 
guished from the second (1) by its prickles straight and slender, 
not stout and habitually curved; (2) by its leaves thin and 
bright green, not firm and dark green, with teeth a little falci- 
form and not open; (3) by the stipules of the cauline leaves 
strongly denticulate and not entire. From an examination of 
specimens sent to me by Mr. Greene, undetermined, but with 
no doubt as to their identity with R. gratissima, 1 would point 
out (1) that the prickles are slender and straight, abundant and 
all scattered on two long fragments of stems, less abundant on the 
