58 -RypBerG: NOTES ON ROSACEAE 
26. Rosa RuGOsA Thunberg 
Common in cultivation and occasionally found as an escape; 
it is well established in a few places in Connecticut and on Nan- 
tucket Island. 
27. ROSA BLANDA Ait. 
The species was based on three different elements, judging 
from the following statements in the Hortus Kewensis: 
Nat. of Newfoundland and Hudson’s-bay. 
Cult. 1773, by Mr. James Gordon. 
Fernald* has properly discussed the status of the two native 
specimens covered by the description. Having previously dis- 
cussed the matter with him, the author agreed that the name 
must be applied to the Hudson Bay specimen, rather than the 
Newfoundland one, for the plant is named the ‘‘Hudson Bay 
Rose,’’* and the hypanthium is described as glabrous. Prior to 
this discussion with Professor Fernald, I had held the opinion that 
the Newfoundland plant should be regarded as the type, partly 
because Solander, who prepared part of the manuscript for the 
first edition of Aiton’s Hortus Kewensis, had in manuscript 
called this R. blanda and the Hudson Bay shrub R. blanda 6; and 
partly because R. blanda is described as glabrous. I therefore 
adopted the name R. Solanderi Tratt. for the shrub usually called 
R. blanda, the species with pubescent leaves. Having conceded 
to Fernald’s argument, I have left R. blanda as interpreted by 
Lindley. If the name R. blanda is applied to the Newfoundland 
plant, it would become a synonym of R. virginiana and be elimi- 
nated altogether. 
In the Green Bay region of Wisconsin and Upper Michigan, 
Rosa blanda is much more pubescent than elsewhere, so far as I 
know, and the pubescence of the lower surface of the leaves is 
sometimes as as long as in R. acicularis and R. acicularioides. In 
some of these specimens the leaflets are more elongate-elliptic and 
the hypanthium more elongate, or pear-shaped, or with a distinct 
neck, and in such cases the specimens are probably of hybrid origin, 
i.e., represent R. acicularis X blanda. In the same region R. pa- 
lustris is also more pubescent. Could, perhaps, some R. acicularis 
blood have been infused in both many generations back? 
* Rhodora 20: 90-96. 1918. 
