x de 
deo! 
Mr. Woops on the British Species of Rosa. 183 
know what Rosa Dr. Afzelius means to indicate by the name of 
R. pimpinellifolia; and still less is it possible to conjecture what 
is the Rosa “ germinibus ovatis," which was according to him 
first confounded by Linneus with R. spinosissima, and afterwards 
with that species blended into R. pimpinellifolia: but I have only 
been able to procure the first, second, third, fifth, sixth, seventh, 
eighth, ninth, and tenth of his Tentamina ; in the last of which he 
resumes the consideration of this species, as described in the works 
of the Swedish botanists previous to Linnæus, and no further. Per- 
haps, if 1 had been able to consult the eleventh Tentamen, I might 
have found all difficulties resolved. Be that as it may, the R: spi 
nosissima of the Linnzean Herbarium is certainly the English plant, 
and no variety of R. cinnamomea. I can have therefore no doubt 
in retaining the name, which would be very reluctant] y tratisterred 
to a plant almost without prickles or thorns. | 
Willdenow describes R. pimpinellifolia as distinct from R. spi- 
nosissima ; as also does Gmelin, Fl. Bad. Als. ii. 415: but I can- 
not understand from either of them in what the difference con- 
sists, except in the “ aculei sparsi," which is the essential cha- 
racter given by Linnzus, in opposition to the * aculei conferti? 
- of R. spinosissima, and is retained by both these authors. Dr. 
Roth, Fl. Germ. i. 217, and ii. 556, seems nd acknowledge E 
eine to ro ded the qe dips i Hit 
£ "AE 
PE b 
4. Rosa INVOLUTA. — 
R. ebracteata, caulibus setigeris, receptaculis globosis, foliolis du- 
| plicato-serratis supra glabris, aculeis confertissimis. 
R. involuta. Fi. Brit. 1398. Eng. Bot. xxix. t. 2068. 
Frutex 'ereetusy ddtigesife.. Rami stricti, fusci, aculeis confertis, strictis, reclinatis vel 
horizontaliter patentibus, valde inæqualibus, tandem in setas immutatis, muniti, . Pe- 
tioli aculeis reclinatis instructi, glandulosi, sparsim pilosi, Stipudee lineares, glandu- 
loso-ciliate, subæquales, sed interdum ez floribus propiores ceteris aliquantulum 
latiores, 
