ROSA colli na*
Rough-stalked Dog-rose.
ICOSANDRIA Polygynia.
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. Fruit ovate, smooth. Flower-stalks bristly,
clustered. Prickles of the stem hooked. Leaflets
ovate, downy beneath.
Syn. Rosa collina. Jacq. Austr. v. 2. 5% t l Q7
mild. Sp. PL V. 2. 1 0 7 8 .
jVTr . WIL L IAM BORRER, to whom the scientific botanists
ot this country are so much indebted for his various
cryptogamic discoveries, has first distinguished this Rose in
E-ngland, as different from the canina, t. 992. On his communicating
it to us, we find it by Jaccjuin’s own specimens,
as well as his excellent description and figure, to be his col-
lina. ft might seem by the dissertation of Professor Afzelius.
translated m the Annals o f Botany, v. 2. 211, to be what he
mentions as confounded under canina, but a specimen sent
by himself proves certainly different.
R. collina is common in Sussex, flowering in July, and
ripening fruit in October. Perhaps it will be found in other
counties, but I have not observed it near Norwich, though I
have not been inattentive to this genus. Its habit varies in
eing more or less dense and bushy, but in general agrees
with the canina. The leaflets vary in length and round'ness,
but are always downy (or rather finely hairy) beneath, particularly
the rib; sometimes they are slightly so above. They
have no scent. The flowers are blush-coloured and fragrant
growing commonly 2 or 3 together, on stalks covered with
glandular bristles. Germen ovate, smooth, except now and
then a straggling bristle or two. Fruit exactly like R. canina.
i he prickles of the stem and footstalks are hooked, as in that
species, but the leaves are remarked by Jacquin to be thicker
and less shining.