2610
R O S A dumetorum.
Thicket Rose.
ICOSANDRIA Polygyria,.
Gen. Char. Cal. urn-shaped, fleshy, contracted at
the orifice, terminating in 5 segments. Petals 5
Seeds numerous, bristly, fixed to the inside of
the calyx.
Spec. Char. Prickles falcate, uniform. Leaflets simply
serrated, slightly hairy on both sides. Calyx
segments loosely pinnate. Fruit elliptical.
S yn Rosa dumetorum. |j Thuill. Paris. 250.
Woods Tr. of L. Soc. v. 12. 217. Sm. Engl. FI.
v. 2. 392. .
R. canina dumetorum. Lindl. Ros. 99. Fries Nov.
Suec. ed. 2. 147. Desv.Journ. Bot. 1813.
v. 2. 115. and several of his other varieties.
“ TjEVIS sane differentia,” as Professor Fries observes,
1 quae e pilo pendeat 11 Admitting this, we cannot but incline
to the opinion of those botanists who would reunite not
onlY R- sarmentacea, but also R . dumetorum and R . Forsten
of Smith’s English Flora with R. canina, from various torms
of which they are distinguished chiefly by their pubescence.
Still we think it may be Useful to present to our readers
the plants intended by Woods and Smith.
The plant before us, the original R. dumetorum, as, on
Mr Woods’s authority, we believe it, of Thuillier, is frequent
in hedges and thickets, flowering in July, and varying
much in vigour and in denseness of growth, and in
height from about 4 to 6 or 8 feet. The branches are
usually arched; the prickles rather numerous, falcate or
more hooked, with a dilated base. The leaf-stalks are
downy, with a small pale falcate prickle between each ot
the usually three pairs of leaflets, and a few red glands,
such as fringe also the narrow slightly toothed stipules, and
tip the simple, often unequal, serratures of the leaflets.
These vary in shape from ovate to lanceolate ; their upper