322 Mr. Woods on the British Species of Rosa. 



the leaves shining, with a silky pubescence. The author refers 

 to Jacquin ; but he must I think totally have mistaken the 

 plant. 



Rosa arvcnsis. Roth Fl. Germ. i. 217, & ii. 554 ; R. corymbifera, 

 GmeL Fl. Bad. Ah. ii. 424, resembles in some respects the va- 

 riety y; but the leaves 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. 

 Fl.Fr. vi.535, which has white flowers, and occasionally a few hairs 

 on the upper surface of the leaves. H./as^igia/a (of the same work 

 and page)may likewise be a sub-variety of R.coUina y, with flowers 

 more numerous than common : the shape of the leaves will not 

 permit me to join this latter to R. surcidosa, with which otherwise 

 the flowers "disposes en corymbe assez large" might indicate an 

 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 suflicient to distin- 

 guish it as a species from R. cnnina ; and on the other, whether 

 with so much difference of habit it ought not itself to be further 

 divided. 



22. Rosa hibernica. 



R. receptaculis globosis, aculeis uncinatis incequalibus, foliolis 

 simpliciter serratis. 



R. hibernica. Engl. Bat. xxxi. t. 2196. 



Frutex 



