RECAPITULATION OF THE SECTIONS AND GROUPS 131 
doubtful occurrence. Var. evanida Christ is at present confined 
to Ham Common, Surrey, and var. pseudo-rusticana Crép. is also 
canina forms. 
Section Pimpinellifolie.—The group R. spinosissima is the 
best defined one we have, and quite unmistakable. BR. pi mpinelli- 
folia Linn. is nothing but a smooth- Pag variety of R. spino- 
sissima Linn., though in Britain it is the commoner of the two. 
ee Riparti Déségl. is a markedly biserrate <a which occurs 
n Barnes Common, Surrey, ond: though intermediates are found 
pls whare and &. mitissima Gmel. isa mountain form. R. rubella 
& 
ie) 
5 
fe 
BS 
o 
oo, a 
— 
ca 
8 
os 
"mM 
5 
a 
a mere sport is the correct on 
Lindley’s varieties, though if strength and direction of prickles 
and shape of leaflets - ain we might divide our typical 
= eis several varieties. 
n of Pempiasifolic hybrids.—Though as a section these 
hybrids oe usually easily recognised, there is, I fear, great confu- 
sion over their grouping. It is by no means so easy as it might 
supposed to distinguish between hybrids of a spinosissima 
form, eerpounded with one of the Villose, from those with the 
Rubigino os@ or Hu-canine, and it is still more difficult to diagnose 
those formed from the various groups of those subsections, whilst 
egarded 
as species, have been based with a disregard of those of the 
possible parents; moreover, se distinctions on paper have been 
much too finely drawn, e.g. between R&. Sabini, R. involuta, and 
n 
but - ould 
district are those most likely to form hybrids, moreover, habit is 
not as a rule egy Sheet = a dried ae Notes at the time 
members of the subsection itself, while others run so oe the 
Spinosissime that they might be taken for them, but the pre- 
sence of hairs on the under surface of the leaflets will almost 
invariably mark the hybrids, while the very imperfect develop- 
ment of the fruit, and, in the majority of ge the presence of 
acicles on phe Jose at least in some part, should assist in diagnos- 
ing the w 
oe i Subsection ee oe p of pes 
oonina tas eibadidely easily recognisable, and in England, 
