Rheum
Sp. Pl. 1: 371. 1753: Gen. Pl. ed. 5, 174. 1754.
| Taxon | Illustrator ⠉ | |
|---|---|---|
 | Muehlenbeckia complexa Emex australis Rheum rhabarbarum | Bee F. Gunn Bee F. Gunn Yevonn Wilson-Ramsey |
Herbs, perennial; roots fleshy. Stems erect, glabrous or pubescent. Leaves deciduous, mostly basal, alternate, petiolate; ocrea persistent or deciduous, chartaceous; blade cordate-ovate to orbiculate or reniform, margins entire, undulate. Inflorescences terminal, paniclelike, pedunculate. Pedicels present. Flowers bisexual, 1–10 per ocreate fascicle, base stipelike; perianth nonaccrescent in fruit, whitish green or pinkish green, campanulate, glabrous; tepals 6, distinct, sepaloid, dimorphic, outer 3 narrower than inner 3; stamens (6–) 9; filaments distinct, free, glabrous; anthers yellow or pinkish, elliptic; styles 3, erect or deflexed, distinct; stigmas capitate. Achenes exserted, dark-brown, winged, 3-gonous, glabrous. Seeds: embryo straight or curved. x = 11.
Distribution
Introduced; temperate regions, Eurasia
Discussion
Species ca. 60 (1 in the flora).
Selected References
Lower Taxa
"/2" is not declared as a valid unit of measurement for this property.