Subshrubby perennial. Leaves entire, petiolate. Flowers in congested clusters. Calyx campanulate, 5-toothed, unwinged, accrescent and enclosing the fruit. Corolla narrowly campanulate with 5 lobes. Ovary 2-locular. Fruit a berry. Derivation of name: after Henry Witham, an English palaeobotanist of the early 19th century. Worldwide: c.10 species, occurring in the Old World Caprivi: 1 taxon. |
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