256 
POLYGONEjE. 
10. R. Hydrolapathum (Huds.) ; enlarged pet. ovate-triangular 
nearly entire all tubercled, I. lanceolate acute tapering below into 
a petiole which is fiat above. — E.B. 2104. — St. 3 — 5 feet high. 
L. often more than a foot long. Whorls crowded, mostly leaf- 
less. Nut elliptical. — Mr. Borrer possesses a plant under this 
name "from Lewes in Sussex," "with a cordate base to the 
root leaves," which will probably prove to be R. maximus Schreb. 
— Ditches and river-sides. P. VII. VIII. Great Water Dock. 
*11. R. alpinus (L.) ; enlarged pet. cordate-ovate membranous 
entire or denticulated one bearing a small tubercle, I. roundish- 
cordate obtuse with channeled petioles, upper I. ovate. — E. B. S. 
2694. — Whorls crowded, mostly leafless. Nut elliptical, acute. 
■ — Hellensburgh. Glen Luss. Dollar. Derbyshire. Formerly cul- 
tivated. P. VII. Monk's Rhubarb. E. S. 
** Flowers dioecious. Herbage acid. Acetosella Tourn. 
Sorrels. 
12. R. acetosa (L. ?) ; enlarged pet. roundish -cordate entire 
membranous with a very minute tubercle at the base, sep. reflexed, 
L. oblong sagittate, stipules laciniate-dentate. — E. B. 127. ? — 
Height 1 — 2 feet. Whorls leafless. Nut elliptical with acute 
angles. I noticed a very fleshy variety amongst rocks near the 
sea at Zennor, Cornwall. — It seems almost certain that this, 
which is the R. Pseudo-acetosa (Bert.), is a different species from 
Smith's and the Linnaan plant which I have not seen and 
which has more elongated leaves and ovate enlarged pet. each 
with an oblong green gland extending through more than half 
its length. Bertoloni (Fl. Ital. iv. 255.) states that that plant is 
cultivated in Italy. Has it been found in a wild state in Britain ? 
— Meadows and pastures. P. V. VI. 
13. R. Acetosella (L.) ; petals scarcely enlarged ovate not 
tubercled, sep. ascending, 1. lanceolate-hastate or linear with en- 
tire lobes, stipules torn. — E.B.167-1. — Height 6 — 10 in. Whorls 
leafless. L. very variable in breadth. — Dry gravelly places. P. 
V. — VII. Sheep's Sorrel. 
[R. scutatus (L.) which has hastate-ovate slightly fiddleshaped 
1. has been found " naturalized" at Craigmillar Castle near Edin- 
burgh by Mr. E. Young.} 
2. Oxyria Hill. 
1. 0. reniformis (Hook.). The only species. — E. B. 910. — 
St. 8 — 10 in. high, usually leafless. L. radical, reniform, slightly 
notched at the end with the nerves radiating from the insertion 
of the long footstalk. Pedicels thickening upwards, jointed in 
the middle. The permanent pet. not at all enlarged. — Lofty 
mountains. P. VII. VIII. Mountain-sorrel. 
