A LIST OF BRITISH ROSES 57 



D. SECTION PIMPINELLIFOLIiE HYBRIDS. (See p. 7.) 

 Key to Groups. 



1 jPediincles hispid-glandular 2 



(Peduncles smooth PIMPINELLIFOLI^ x EU-CANIN.E (b) 



{Leaflets eglandular or with many but small subfoliar glands 

 PIMPINELLIFOLI^ x VILLOS^ (a) 

 Leaflets with numerous conspicuous subfoliar glands 

 PIMPINELLIFOLIZE x RUBIGINOS.E (c) 



a. GROUP PIMPINELLIFOLI^ x VILLOS^. (See p. 8.) 



, I Leaflets simply serrate or only moderately biserrate 2 



\ Leaflets strongly biserrate 5 



n (Leaflets small, close set, and suborbicular occidentalis. 



(Leaflets medium or large 3 



n (Leaflets quite uniserrate Wilsoni. 



(Leaflets more or less biserrate 4 



(Sepals entire ; fruit aciculate involuta. 

 Sepals more or less pinnate ; fruit usually, not always, smooth 

 Bohertsoni. 



f. I Fruit globose, more or less hispid 6 



(Fruit ellipsoid, smooth gracilescens. 



Large prickles decidedly curved; peduncles two, one slender and 

 6- often drooping ; stout bush gracilis. 



AH prickles straight or nearly so Sahini. 



b. GROUP PIMPINELLIFOLI^ x EU-CANIN.E. (See p. 9.) 



(Leaflets hairy beneath 2 



( Leaflets glabrous both sides glabra. 



(Leaflets uniserrate 3 



2 

 ( Leaflets biserrate 4 



'Prickles very numerous, slender, mixed; leaflets hairy both sides; 



fruit depresso-globose Margerisoni. 



Prickles scattered, mostly uniform, stout, hooked; leaflets hairy only 

 on midribs and primary veins beneath ; fruit broadly ovoid 



liihernica. 



(Leaflets quite hairy; sepals entire, glandular Icevigata. 



4 j Leaflets quite glabrous above; sepals pinnate, somewhat glandular 

 [ Webhii. 



c. GROUP PIMPINELLIFOLI^ x RUBIGINOS^. (See p. 10.) 



(Leaflets small, roundish, obtuse; prickles very unequal, densely 

 1^ mixed biturigcnsis. 



(Leaflets large, elliptical, acute ; prickles subequal, mostly large ... 2 

 o (Leaflets glabrous above, hairy midribs only beneath ... Nicholsonii. 



(Leaflets hairy both sides Moorei. 



E. SUBSECTION EU-CANIN^. (See p. 10.) 



Key to Groups and Subgroups. 



^ jLeaflets glabrous both sides 2 



( Leaflets hairj', at least on midribs beneath 7 



Journal of Botany, Dec. 1911. [Supplement.] / 



