222 Mr. Woops on the British Species of Rosa. 
the leaves shining, with a silky pubescence. The author refers 
to Jacquin ; but. he must È hiik sama have mistaken the 
plant.  . 
Rosa arvensis, Roth Fl. Germ. i. 217, & i. 554; R. corymbifera, 
Gmel. Fl. Bad. Als. ii. 424, resembles in some respects the va- 
riety y; but the isis are said. by the latter writer to be hairy 
on both sides. It is not explained whether the serratures of 
the leaves are double or single; Roth describes his plant as a 
robust shrub ten feet high, with leaves attenuated at both ends; 
a character which rather belongs to this than to any other of the 
pubescent-leaved Roses of the canina tribe. 
` Perhaps to this species we must refer R. leucantha, Lam. et Dec. 
FI. Fr. vi. 535, which has whiteflowers, and occasionally a few hairs 
on the upper surface of the leaves. R. fastigiata (of the same work 
and page)may likewise be a sub-variety of R.collina y, with flowers 
more numerous than common : the shape « of. the leaves will not 
permit me to join this latter to R. surculosa, with which therwise 
the flowers ** disposés en corymbe assez large” might indicate am 
affinity. All Roses with hooked thorns of nearly equal size, 
having the leaflets smooth above, and the petiole and midrib on 
the under surface hairy ; the styles distinct and included, or nearly 
included, in the germen,—must be considered as belonging to 
this species. I must leave it to future investigators to decide on 
the one hand, whether these characters are sufficient to distin- 
guish it as a species from R. canina; and on the other, whether 
with so much difference of habit it ought not itself to be further 
divided. 
29. Rosa HIBERNICA. 
R. receptaculis globosis, aculeis uncinatis inæqualibus, ipuem 
simpliciter serratis. 
R. hibernica. Engl. Bot. xxxi. t. 2196. 
Frutex 
