2. Rheum ribes Linnaeus, Sp. Pl. 372. 1753; Losinsk. in Kom. Fl. URSS 5: 497. t. xxix. f. 4. 1936; Kitamura, Fl. Afgh. 95. 1960; Cullen in P.H.Davis, Fl.Turk. 2: 268. 1967; Rech.f. & Schiman-Czeika, l.c. 27; R.R.Stewart, l.c. 212.
A dichotomously branched perennial herb, up to 1 m tall. Stem solid, warty, leafy below, leafless above. Leaves 2(-5) petiolate,petiole half the length of leaf, blade suborbicular, obtuse, 30-50 x 25-40 cm, cordate, usually glabrous above, verrucose below, at the base somewhat spiny on the veins, 3-veined, broader than long, margin ± undulate. Flowers pedicellate, pedicel articulate at or below the middle, 6-7 mm long. Perianth segments 6 in 2 whorls, c. 3 mm long, 1.5 mm broad, persistent in fruit. Fruit ovate-oblong, cordate, c. 1.5-1.8 x 1.2-1.5 cm. Nut ovate-oblong, dull brown; wings reddish, broad.
Fl. Per.: June-July.
Type: Habitat in Persia, Libano, Carmelo (sic.).
Grows between 1000-4000 m on dunite rocks, among stones and slopes; Distribution: Iraq, Turkey, Iran, Pakistan, Afghanistan and Russia.
The leaves and petiole are often eaten raw as salad, sometimes sold in the local markets of Northern Balochistan.