IO Harrison: Wild Roses of Durham. 
as only rarely are the pink flowered forms allowed to fruit, and, 
if they do fruit, their ornamental bristly fruits are soon taken. 
On the other hand, we have the same scarcity of this group 
in areas in other counties of similar geological formation where 
the population difficulty does not exist. 
The Rubiginose are to be found dotted here and there in 
very small numbers and in such suspicious localities that one 
is irresistibly forced to the conclusion that, as far as our county 
is concerned, this group is merely a naturalised one. 
To the Systyle and Synstyle I think the same applies ; 
the former is not recorded by Baker and Tate while the latter 
has now vanished from many of the stations given by them, 
and elsewhere is always found in positions such as to lead one 
to imagine that the plants had been planted for the purposes 
of cover. 
The other groups usually listed are merely hybrids and, of 
course, can only occur where their parent forms overlap and, 
in our counties, these possible areas are almost all near the 
sea coast. 
SYNSTYLA. 
ROsA ARVENSIS Hudson. 
Rare in plantations Ravensworth ([a.) quite typical. 
SYSTYLZ. 
ROSA SYSTYLA Desv. 
A single plant referable to this species has likewise been 
discovered at Ravensworth, and as the form is 
exclusively southern it seems probable that it was 
planted with the Rosa arvensis noted above. 
EUCANINA. 
ROSA CANINA L. 
m.* Jutetiana Lem. Common in all the divisions. 
m. flexibilis Desigl. Scarcely worth a name differing 
from lutetiana practically in the styles only (Ia.) 
Birtley ; (VII.) Billingham. 
m. senticosa Ach. (VII.) Cowpen Bewley. 
ROSA SARMENTACEA Woods = dumalis Bech. 
Practically typical forms occur at (Ia.) Birtley; (II.) 
Wolsingham ; (III.) Satley, Lanchester, Witton 
Gilbert ; (IV.) general ; (VII.) general. 
m. biserrata Mér. A strongly biserrate form, but with 
feebly glandular peduncles apparently intermediate 
between this and the type, but leaning most 
strongly toward biserrata, occurs at Lamesley (fa.) 
m. Malmundariensis Lej. Fine and typical. (II.) ina 
dene just above Wolsingham ; (VII.) near Greatham. 

*m. = microgene, or little species, a term applied to the members of 
an aggregate species. 
Naturalist, 
