178 | Mr. Woops on the British Species of. Rosa. 
Rosa rubella is an interesting species, as it is so exactly between 
the families of R. alpina and R. spinosissima, that it might almost 
indifferently be referred to one or the other. The aculei are few 
and frequently wanting, as in the former tribe ; the setze, though 
not uniformly deciduous, are yet very apt to fall off; and the 
fruit, though not properly urceolate, is distinguished from that of 
R. spinosissima and its affinities by a very evident neck. Of the 
family of R. alpina we have no British Rose; it includes besides 
that species R. pendulina, R. lagenaria, and R. pyrenaica. 
Mr. E. Forster has a plant raised from seeds which were sent 
from Ireland for R. hibernica, and which, if not a distinct species, 
must be referred to R. rubella. The receptacle during the inflo- 
rescence is very long, and the leaves of the calyx are furnished. 
with small offsets. The prickles are extremel y slender, and more 
curved than is usual in the tribe, and the leaflets are narrower 
than their general form in this and the following species. There 
is a specimen closely resembling it in the Banksian Herbarium, 
where it is referred to R. pimpinellifolia, and marked Hort. Pit- 
cairn. 1781. : | 
3. Rosa SPINOSISSIMA. 
R. ebracteata, caulibus setigeris, receptaculis globosis, serraturis 
foliolorum simplicibus, aculeis confertis valde inæqualibus. © 
R. spinosissima. Linn. Sp. Pl. i. 905. FI. Brit. ii. 537. Eng. 
3 Bot. iii. t. 187. Willd. ii. 1067. Roths FL Germ. i. 217. ii. 555. 
R. pimpinellifolia 8. Lam. et Dec. Fl. Fr. iv. 438. 
R. pumila spinosissima, foliis pimpinellæ glabris flore albo. Raii 
Synop. 455. 
Frutex erectus, in apricis bipedalis, quandoque in umbrosis multo elatior. Rami breves, 
interne fusci, aculeis reclinatis vel horizontaliter patentibus, rectiusculis, confertis, valde 
inzequalibus, tandem in setas immutatis, muniti, Pe/ioli nunc glabri, sæpius glandu- 
losi, interdum aculeis rectis instructi, acerosi, rarius pilosi. : Stipulæ lineares, glandu- 
loso-serratæ, glabra, equales. Foliola 7-11, foliolum impar, et paria duo superiora 
reliquis majora, inflorescentiam versus subpauciora, simpliciter serrata, hic illic ser- 
ratura 
