Mr. WaoDS on the British Species of Rosa. ■ 173 



ROSA. 



Chaeacter Genericus. 



Receptaculuin carnosuni urceoliire, fauce contractd. 



Calyx 5-phyllus paullum infra fauccm receptaculi insidens. Fo- 



liola plus minus triangularia, tomentosa, aestivatione imbricata. 

 Fetala 5, obcordata, disco faucis receptaculi basi angustissimd 



affixa, venosa. 

 Stamina plurima, disco receptaculi afBxa. 

 Germina numerosa, superficiei interna^ receptaculi aflSxa; inferiora 



pedicellata. Styli tot quot germina per faucem receptaculi 



transeuntes. Stigmata obtusa. 

 Frucius : Receptaculum auctum baccatum, semina includens. 

 Semina numerosa, angulosa. 



Observation. 



I have already explained the reasons which have determined me to consider the young 

 fruit of the Rose as a receptacle. In the abortive attempts to produce flowers, which so 

 frequently occur in Rosa sulphurea, this part is flat as in PotentUla. In R. turlinala and 

 a Rose called R. caroUmana in the gardens about London, it is cup-shaped ; and some- 

 times even in our single English Roses a tendency to this form may be observed, but never 

 without being accompanied by other circumstances of monstrosity. 



In addition to the above characters, it may be observed, that all British Roses have weak 

 stems furnished with prickles j pinnate leaves with serrated leaflets ; and linear stipulae ge- 

 nerally furnished with glands on the edges, decurrent on the petiole of the leaf. 



SvNoPsis 



