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

4. Rheum tibeticum Maxim. ex Hook. f. in Hook. f., Fl. Brit. India. 5:56. 1886; Kitamura, l.c. 45; Rech.f. & Schiman-Czeika, l.c. 26; R.R.Stewart, l.c. 213.

Perennial stemless herb. Leaves all basal, petiolate, 10-20 cm long, leaf blade very leathery, orbicular, cordate, obtuse, entire or crenulate, 5-nerved, nerves thick, 10-35 x 11-30 cm, glabrous above or sparsely papillose, ± papillose below. Scape 1-5, glabrous or laxly papillose, up to 1 m tall; inflorescence a pedunculate leafless panicle. Flowers bracteate, pedicel 2-3.5 mm long, 2-2.5 mm across. Perianth segments 6, 2-2.5 mm long. Fruit 8-10 mm across, almost orbicular wings broad, brownish red, notched at both ends.

Fl. Per.: July-August.

Type: Zanskar. Thomson s.n. (K!).

Grows on drier slopes, between 2500-4000 m; Distribution: Afghanistan, Pakistan, India and Xizang.


 

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