144 Flora of Devon and Cornwall, by I. W. N. Keys. 
e. R. Forsteri {Sm.)—E.B.S. 26 11.— Hedges and thickets. 
— J). Redhill, near Exeter: Par/, in Rav. 
R. systyla (Woods). — E.B. 1895. — Hedges and thickets. — D. 
Near Exeter: Parf.'m Rav. Chudleigh: Stew. ib. Near Ilfra- 
combe : Park. ib. — C- Near Gwyllyn-vase, " very rare :" Polytech. 
1856. 
R arvensis (Huds.) — E.B. 188. — Hedges and thickets. — J). 
Common. Plymstock ! ; Bickleigh ; Tavistock, In the vicinity of 
Chudleigh : Jones's Bat. Tour. — C- Harewood. About Falmouth, 
"common:" Polytech. 1856. Trailing Dog-Rose. 
Ji collina (Jacquin). — Hedges and thickets. — D- and C- About 
Plymouth, on both sides of the Tamar, where it was discovered by 
Mr. T. R. A. Briggs, a year or two since. He submitted specimens 
to Mr. J. (jr. Baker, who examined them and determined the 
species. That gentleman thus writes in Journ. Bat. iii. 82 : — 
"At length the true Rosa collina of Jacquin may take its place upon our 
British lists. Mr. T. R. A. Briggs has met with it in considerable quantity 
in the neighbourhood of Plymouth. * * * The following description is taken 
entirely from his specimens and notes : — 
"Rosa (Series Canine— Section Hispid^) collina, Jacq. Atistr. tab. 197. A slirub, 
six to ten feet high, with arching shoots and the habit and appearance of R. canina. 
Prickles uniform, uncinate, moderately robust below, measuring about three-eighths 
of an inch from base to point upon the full-grown stems. Leaves similar in size to 
those of R. canina, firm in texture, full gi-een and quite glabrous above, paler beneath, 
and hairy on the veins, the serrations moderately sharp and open, simple or some- 
times a little unequal, the terminal leaflet typically ovate, the petiole hairy and 
aciculate, but only slightly setose. Stipules naked or very slightly haii-}' on the back, 
faintly setose- ciliated. Peduncles rather thickly beset with strong setae, the calyx- 
tube gracefully ovate- ui'ceolate, naked or just setose at the base. Sepals fully pinnate, 
naked on the back, very slightly setoso-ciliated, reflexed after the whitish petals fall, 
deciduous before the ovate-urceolate fruit changes colour, which near Plymouth is 
early in September. Styles glabrous or very nearly so." 
Since noticed by Mr. Briggs near Launceston, and about Truro 
and Perran, Cornwall ; Journ. Bot. iv. 289. 
Crataegus Linn. Hawthorn. 
C. Oxyacantlia (L.) — a. C. Oxyacantlia (L., Jacq.) — p. C. viono- 
gyna (Jacq.) — Hedges and thickets ; ji. the more common form. — 
D- and C- Common. 
