300 66. 



high. L. very long, 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. alpinus (L.) ; enlarged pet. cordate-ovate membranous 

 entire or denticulate without tubercles, /. roundish cordate-blunt 

 ivith channelled petioles, upper 1. ovate. E. B. S. 2694. Whorls 

 crowded^ mostly leafless. Nut elliptic. Formerly cultivated. 

 P. VII. Monk's Rhubarb. E. S. 



** Fl. dioecious or polygamous. Herbage acid. Sorrel. 



14. R. Acetosa (L.) ; enlarged pet. roundish-cordate entire 

 membranous with a very minute tubercle at the base, sep. refle.red, 

 1. oblong sagittate, stipules laciniate-dentate. E. E. 127. 

 Height 1 2 feet. Whorls leafless. Nut elliptic with acute 

 angles. Woods. P. V. VI. E, S. I. 



15. R.Acetosel r la(^L.) ; dioecious, petals scarcely enlarged ovate 

 not tubercled closely adpressed to nut, sep. ascending, 1. lanceolate- 

 hastate or linear with entire lobes, stipules torn. E. B. 1674. 

 Height 6 10 in. W r horls leafless. L. very variable in breadth. 

 [a. JR. angiocarpus (Murb.) Pet. adhering to nut. (3. E. Acetoselloides 

 (Bal.). Pet. not adhering to nut.] Dry gravelly places. P. V. 

 VII. Sheep's Sorrel E. S. I. 



[R. scutdtus (L.); polygamous, 1. hastate-ovate, slightly 

 fiddle-shaped, is naturalized near Edinburgh, &c. Sy. E. B. 



1222.J 



2. OXYK'IA Hill. Mountain-Sorrel. 



1. O. digyna (Hill). E. B. 910. O. 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 mountains. P. 

 VII. VIII. E. S. I. 



3. POLYG'ONUM Linn. 



* Rhizomatous. Stem simple. Ocrece truncate. Nut tri- 

 quetrous. Stam. 8. Styles 3. Bistorta. 



1. P. Bistorta (L.) ; raceme cylindric dense, L ovate subcor date, 

 root-1. with winged footstalks, faces of nut ovate smooth. 

 E. B. 509. St. 1 1 foot high. Khizome large. El. flesh- 

 coloured. Moist meadows, rare. P. VI. and X. Snakeweed. 



E. S. L 



