360 
66. POLYGONACE^E. 
whorls crowded, mostly leafless. Near Lewes, Winchester, 
Kelvedon in Essex, and in Scilly Isles. — Perhaps not distinct 
from Sp. 11. P. VII. VIII. E. 
*13. R. alplmis (L.) ; enlarged pet. cordate-ovate mem- 
branous entire or denticulate without tubercles, I. roundish 
cordate-blunt with channelled petioles, upper I. ovate. — E. B. S. 
2694. — "\Miorls crowded, mostly leafless. Xut elliptic. — 
Formerly cultivated. P. VII. Monk's Rhubarb. E. S. 
** Fl. dioecious or polygamous. Herbage acid. Sorrel. 
14. R. Acetdsa (L.) ; enlarged 2^6t. roundish-cordate entire 
membranous xvith a very minute tubercle at the base, sep. rejlexed, 
1. oblong sagittate, stipules laciniate-dentate. — E. B. 127. — 
Height 1—2 feet. Whorls leafless. Nut elliptic with acute 
angles.— Woods. P. V. VI. E.S.I. 
15. ^. Acetosel'la (L.) ; dioecious, petals scarcely enlarged ovate 
not tnbercled closely adjyressed to mit, sep. ascending, 1. lanceolate- 
hastate or linear with entire lobes, stipules torn. — E. B. 1674. — 
Height 6 — 10 in. \\Tiorls leafless. L. very variable in breadth. 
[a. angiocarp'us (Celak.) Pet. adhering to nut. /3. oymnocaTpv.< (Celak.) Pet. 
not adhering to nut.] — Dry gravelly places, p. v.— VII. Sheep's 
Sm-rel. E. S. I. 
[R. scutdtm (L.) ; polygamous, 1. hastate-ovate, slightly 
fiddle-shaped, is naturalized near Edinburgh, &c. Sy. E. B. 
1222.] 
2. Oxyr'ia Hill. Mountain-Sorrel. 
1. 0. digyna (HiU).— B. 910. 0. reniformis (Hook.) ed. 
viii. — St. 8 — 10 in. high, usually leafless. L. radical, reniform, 
slightly notched at the end : veins radiating from the insertion of 
the long footstalk. Pedicels thickening upwards, in a spikelike 
raceme. Permanent pet. not enlarged. — Lofty mountams. P. 
VII. VIII. E. S. I. 
3. Polyg'ontjm Linn. em. Gaertn. 
* Rhizomatous. Stem simple. Ocrece truncate. Nut tri- 
quetrmis. Stam 8. Styles 3. Bistorta. 
1. /'. Bistw'ta (L.) ; raceme cylindric dense, I. ovate subcordate, 
root-1. with winged footstalks, faces of nut ovate smooth. — 
E. B. 509.— St. 1— U foot high. Rhizome large. Fl. flesh- 
coloured. — Moist meadows, rare. P. VI. and X. Snakeweed. 
E. S. I. 
