ORD. XL. HOLERACEA. 
RHEUM UNDULATUM. ? WAVED-LEAVED, or CHINESE 
RHUBARB 
SYNONYMA. Acetosa montana. Messerch.m. in Am. Ruth. 226. Rheum 
sinense. Amm. Herb. 206. Rheum Rhabarbarum. Linn. Syst. Veg. 385; 
—Pallas, It. 2. 559. Rheum undulatum. Linn. Sp. Pl.531; Ameen. Acad. 
3. p.212, t.4; Willd, 2. 489; Hort. Kew, ed. 2. v. 2. p.430; Plenck. Ic. 
t. 321. 
Class. Enneandria. Ord.  Trigynia. 
Nat. Ord. Holeracee, Linn. Polygonea, Juss. 
Gen. Char. Calyx, O. Corolla, six-cleft, persistent. Seed, one, three- 
sided 
_ Spec. Char. Leaves, villous, wavy ; the sinews dilated at the base. eels, 
flat above, with an acute edge. 
THIS species of Rhubarb is a native of China, Siberia, and Tartary; and 
was supposed by Boerhaave to be the plant which yields the true Chinese 
and Turkey Rhubarb.* The root of this plant is divided into a number of 
* Another species of this genus, the Rheum compactum, a native also of Tartary, pos- 
sesses similar medicinal properties, and the roots resemble those of the Rhewm undula- 
tum; hence, it is most probable, that the markets are supplied indiscriminately from 
both.species. The Rheum Australe, described by Don,—Prodr. Fl. Nepal. p.75, and 
figured by Sweet in the British Flower Garden, is now considered by many to be the 
true Officinal Rhubarb. 
Vou. V. M 
