ROSA CORIIFOLIA 97 
GROUP OF ROSA CORIIFOLIA. 
The characteristics of this group are less well defined than 
those of the R. glauca group, with which, however, it has some 
always hairy, even if only thinly so on the m ath. The 
stipules are not so conspicuously large and broad. Ps affinities 
therefore run into the &. dwmetorum and R. Borreri groups, in 
which some of the Magen might deity well is os hist 
I have found it a what troublesome group to deal with. 
Its British representatives, with the exception of those of sub- 
found on the Continent; I am unable, therefore, 
as in the other groups, except in so far as the British specimens 
contained therein are concerned. Specimens in the saa sr 
barium show such great variation that little assistance is 
derived from their beet unless it be to show how vitals ‘hd 
— a group it 
r these ‘ani ‘the group does not readily lend itself to sub- 
awibiea: the characteristics on which any subgroup might be 
formed showing much inconstancy. The least fake character 
is perhaps the leaf-toothing, which I have taken as the basis of 
the two subgroups I have adopted. 
Subgroup i. Leaflets uniserrate. 
Key To BritisH SPEcIEs, 
Leaflets hairy above, and usually densely so beneath 
R. coritfolia a 
Leaflets glabrous above 
aye pvold Leaflets hairy only on midrib beneath, oe 
; R. implexa Gren. 
Fruit ae birobous. Leaflets hairy all over beneath 
R. cortifolia var. subcollina Christ. 
Rosa CORIIFOLIA 
Fries in Novitize Flore Suecice, ed. 1, p. 33 (1814). 
“ Subglobose fruit ed biti iS rsa Styles very short. 
Prickles recurved. Leav: s, pubescent beneath. 
Shrub, 4-6 ft. or bane pedities or hieieonial, branched ‘itiakly. 
Prickles recurved, whitish or purplish. 9, ovate, 
coriaceous, very shortly petioluled, green, paler faecal, flat, sub- 
obtuse, unequally serrate. Petioles villous, spinose. Peduncles 
solitary, or often umbellate, abecte, longer than the globose or 
ovoid-globose glabrous fruit. Sepals longer than the petals, 
otherwise as in hs canina, edges and inside villous, three pinnate, 
JouRNAL oF Borany, Sepr. 1908. [SuprLeMEnr.] 
