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FOC | Family List | FOC Vol. 5 | Polygonaceae | Rheum

22. Rheum inopinatum Prain, Bot. Mag. 134: t. 8190. 1908.

红脉大黄 hong mai da huang

Herbs short, 20-35 cm tall. Roots stout, 2-3 cm in diam. Stem finely striped, 3-5 mm in diam., muricate, with white hairs. Basal leaves 3-5 in a rosette; petiole red, short, 2-4 cm, densely white hispidulous; leaf blade green adaxially, triangular-ovate or ovate, 7-13.5 × 5-9.5 cm, leathery, glabrous, rarely hispidulous along veins, usually with 5 palmate, light red veins, base cordate or truncate, margin sinuolate, apex obtuse. Stem leaves 1(or 2) or absent. Panicle terminal, branched only once, pubescent. Pedicel 2.5-3.5 mm, jointed below middle. Flowers large. Tepals 6, yellow-white; outer 3 smaller, narrowly elliptic, ca. 2 mm; inner 3 elliptic to broadly elliptic. Stamens equal to perianth. Ovary ovoid. Fruit orbicular, 9-10 × 8-9.5 mm; wings purple-red, with longitudinal vein at middle, persistent inner perianth enlarged, ca. 5 × 4 mm. Seeds ovoid. Fl. Jul, fr. Aug-Sep.

* Slopes; 4000-4200 m. C and S Xizang.


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