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Pakistan | Family List | Pakistan V. 205 | Polygonaceae | Rheum

6. Rheum wittrockii Lundstr. in Acta Horti Berg. 5(3): f.4,5. 23. 1914; Losinsk. in Kom., Fl. URSS 5: 486. 1936; R.R.Stewart, l.c. 213.

Perennial, erect, glabrous, fistular, up to 1 m tall herb. Leaves petiolate, petiole 30-40 cm long; ochreae reddish, densely hairy; blade ovate, 40 cm long, 30 cm broad, acute, cordate, slightly plicate and repand, glabrous above, hairy below and on the margins, 5-veined. Flowers in panicle; pedicel articulate below the middle, acrescent in fruit; white to pink. Perianth segments 6, in 2 whorls, c. 2 mm long, the inner somewhat larger than the outer. Stigmas white, exserted from the perianth. Fruit oblong-orbicular, retuse, cordate, 13-15 mm long and broad; nut brown, faveolate, rugose, ovate; wings red-hyaline, ± cordate at either end.

Type: Turkestan, Taschkent.

Distribution: Pakistan and Central Asia.


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