26 THE SUBSECTION EU-CANINZ OF THE GENUS ROSA 
Léman, however, in his key (see p. 19), separates FR. canina 
Linn. from his lwtetiana, crediting the former with leaflets having 
teeth serrate on the lower side, Most modern authors only use 
R. canina Linn. in an aggregate sense; but Déséglise, acting no 
doubt on Mr. Baker’s note, makes it a segregate, synonymous with 
R. lutetiana Lém. his description of which I will give under the 
latter Qos 
Mr. r, in “A Monograph of British gna in Journ. 
Linn. Soe. xi. p. 225 (1869), uses R. canina Linn. i 
sense, with the following description :—* A tall Sarah with snares 
arching branches. Prickles scattered, robust, equal, hooked. 
Leaflets simply or doubly bagi hapa dig and eglandular Sy 
and deciduous or sometimes ing and subpersistent, usually 
sly pi Styles oe i + dais hai ruit ovate, urceo- 
late, or round ee late), furnished with a conspicuous disc.” 
des in it, however, such glandular d pecies as 
R. B ; ert Déségl. and R. margina 
as well as some that are certainly more S00 % slehtly puBeacent.” 
anina Linn. in a more restricted sense, excluding all 
I B.C 
plants with hairy leaflets, even if only on smd beneath. Talso 
exclude R. glauca Vill. and its varieties. 
The species I group ng oe canina may be conveniently 
divided into four subgroups, t 
i. Leaflets simply serrate, penne on secondary nerves 
nea Peduncles eglandular 
ii. Leaflets biserrate, eglandular on secondary nerves beneath. 
eduncles eglandular. 
iii, Leaflets uniserrate or biserrate, eglandular on secondary 
nerves beneath. Peduncles glandular 
iv. Leaflets biserrate, glandular on midrib and also on secon- 
th nerves. Peduncles glandular or pglendular. 
bines Crépin’s groups R. scabrata and R. Blondea 
na, which are 
included in part of rain s section Rubiginose, subsections 
Pisaaicile and Glandulose 
~ Subgroup i. Lento simply serrate, eglandular on secondary 
erves beneath. Peduncles eglandular. 
Key to Bririsn Specizs. 
Styles hepa i 2 
1 Styles glab ‘ 
*) Styles i ina gia column, Low shrub. Flowers w 
R. plies Rip. 
