184 Mr. Woods on the British Species of Rosa. 



latlores, et etiani in bracteas parvulas immutatae. Foliola 9 ; par superius et fo- 

 liolum impar ceteris majora, omnia elliptica, duplicato-serrata, subtus venulis hir- 

 9uta, supra glabra, nisi interduin nervo quandoque petioli instar pilis sparsis, glandulosa. 

 Pedunctili soiitarii, rarius binati, setis insequalibus obsiti. Receplaculum globosum, 

 atro-fuscum, setis ut pedunculus munitum. Calycis foliola triangulari-lanceolata, in- 

 tegerriina, petala plerumque aequantia, glandulosa, receptaculo pallidiora. Flores 

 cyatbiformes ; petala obcordata, rubescentia, basi albida. S/yZi inclusi j stigmatibus 

 planiusculis. Fructus globosus, setosus : maturi colorem nescio. 



Scotland, principally on the western coast. Glen Lyon, Rev. 

 J. Stuart, D.D. Isle of Arran, Mr. G. Don. 



This Rose is easily distinguished from R. rubella and R. spino- 

 ■sissima, by the double serratures of the leatlets. From R. Doniana 

 it is known with more difficulty ; for though I have uniformly 

 found the upper surface of the leaf without hairs in this species, 

 with the exception already noticed in the description, and as uni- 

 formly pubescent in the other, yet I feel that it would be un- 

 wise to place an entire dependence on this character. Still, how- 

 ever, the expanded flower and comparatively scattered prickles 

 of R. Doinana seem to denote an essential difference between 

 the two plants. The root-shoots of R. Doniana are indeed very 

 full of aculei, though less so than those of R. involuta ; and it 

 must carefully be observed as a general rule in the comparison of 

 these and of all other species of Rosa, that we must draw the pa- 

 rallel between similar parts : — for instance, in the present case we 

 must compare the strong surculi or root-shoots of R. involuta with 

 the surculi of R. Doniana, and the branches of the one with the 

 iaranches of the other; and not conclude that there is no diffe- 

 rence if the surculi of R. Doniana are as thorny as the weaker 

 branches of R. involuta ; for in almost all Roses these strong shoots 

 are decidedly more prickly than the rest of the plant. 



If the distinctive character between this family of Roses and that 

 of R.cinnamomea be drawn from the bractese, as I conceive must 

 Bcccssarily be the case, the young botanist may possibly be led 



by 



