130 THE BRITISH ROSES 
SECTIONS SUBSECTIONS GROUPS SUBGROUPS 
Dumetorum 
Dumetorum Desegliset 
Canescentes 
(| Rewtert 
Eu-canine ee | Subcanine 
(continued) eee { Coritfolie 
[eer ole | Subcolline 
Borreri 
gp RON, Pomifere 
Canine omifera Molles 
(continued) Villose Sherardi 
Tomentosa Fata 
{ glanteria 
- Elliptica 
| Rubiginose ene 
Agrestis 
its var. scabra Baker, and R. ovata Lej. seem to be inseparable; 
var. biserrata Crép., when well marked, is quite distinct, but 
intermediates occur; this var. and R. erronea Rip. seem to 
- arvensis var. major Coste. 
Section Stylose.—Except for typical R. systyla Bast. which is 
fairly constant and easily recognisable, this group is connected on 
one side with that of R. arvensis, and on the other with R. canina, 
am unable to give any characters, either single or in com- 
* 
bination, which will separate it from these two with certainty. 
cylindrical h gmas, and a conspicuously conical disc, are by 
no means always to be found in members e group fi. stylosa, 
hile any or all of these characters may occur in the Hu-canin 
I th some transfer of species from one group to the 
other is desirable, or t: regard must be paid to the 
Laer characters in di i 
e 
ing specimens. ; 
BP haem varieties of this group, the commonest in 
Britain is R. systyla Bast., but R. leucochroa Desv. is lo 
to be quite rare, and its variety corymbosa Desv. is of 
