EUMEX. POLYGONUM. 20;:! 



what cordate, petioles flat and finely margined above. — E. B. S. 

 2698. J?, domesticus Hartm. (not Meisn.). H. lonffifolius Meian. 

 ^Height 3 —4 feet. L. very large. Whorls crowded, mostly 

 leafless, forming a large dense lobed panicle. IS, ut elliptic. — In 

 the North of E. and in S., preferring spots liable to be flooded. 

 P. VII. VIII. E.S. 



10. S. St/drolap'athum (Thiis.}', enlarged pet. ovate-tnaiiffular 

 nearly entire all ttibercled, I, lanceolate acute tapering .below, pe- 

 tioles flat but not margined aboVe.^ — St. 3 — 5 feet high. L, 

 often more than a foot long. Whorls crowded, mostly leafless. 

 Nut elliptic. — ^Ditches and river-sides. P. VII. VIII. Great 

 Water-Dock. E. S. I. 



*11. JR. alpinus (L.); enlarged pet. cordate-ovate membranous 

 entire or denticulate without tubercles; /. roundish-cordate hlunt 

 with channelled petioles, upper I. ovate. — E. B. S. 2694. — Whorls 

 crowded, mostly leafless. Nut elliptic. — Formerly cultivated. 

 P. VII, 3Ionk's Shubarb. , E.S. 



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



12. H. Acetosa (L.) ; enlarged pet. roundish-cordate entire 

 membranous with a very mimite tubercle at the base, sep. refle.ved, 

 1. oblong sagittate, stipules laciniate-deutate. — R. Pseudo-acetosa 

 Bert. St. 74. 7.— Height 1—2 feet. Whorls leafless. Nut el- 

 liptic with acute angles. — Smith describes under this name the 

 H. hispanicus (Koch) which is occasionally cultivated. — Woods. 

 P. V. VI. E. S. I. 



13. R. Acetosel'la (L.) ; dioecious, petals scarcely enlarged ovate 

 not tubercTed adpressed to met, sep. ascending, 1. lanceolate-hastate 

 or linear with entire lobes, stipules torn. — ^Height 6 — 10 in. 

 Whorls leafless. L. very variable in breadth. — Dry gravelly 

 places. P. Vi— VII. SUeps Son-el. , E. S. I. 



[R. scutdtus (L.), polygamous,!, hastate-ovate slightly fiddle- 

 shaped, is natm-alized near Edinburgh and elsewhere.] 



2. Oxtk'ia Hill. Mountain Sorrel. 



. 1. O. renifdrmis (Hook.). — St. 8 — 10 in. high, usually leafless. 

 L. radical, reniform^ slightly notched at the end ; veins radia- 

 ting &om the insertion of the long footstalk. Pedicels thicken- 

 ihg upwards, in a spikelike raceme. Permanent pet. not enlarged, 

 —lofty mountains. P. VII. VIII. E.S.I. 



3. PoLT&'oNUJii Linn. 



* BJdzomatom. Stem simjjle. Ocrece truncate. Nut tri- 

 quetrous. Stam. 8. Styles 3. Bistorta. 

 1. P. Bistor'ta (L.) ; spike dense, I. ovate stdieordate, root-l. 

 with winged footstalks, faces of nut ovate smooth. — St. 1 — li 



