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Wild, H. (1967) The Compositae of the Flora Zambesiaca area. 1. Heliantheae. Kirkia 6(1) 1-62
Erect scabrid herb. Leaves opposite or subopposite (inflorescence bracts alternate), scabrid. Inflorescences of lax cymose panicles; also individual capitula may occur in the forks of the branches. Capitula heterogamous, radiate; ray-florets fertile; disk-florets bisexual and fertile. Phyllaries subequal. Receptacular scales folded and enclosing the florets. Ray-florets with a minute (< 2 mm) 2-3-fid ligule. Anther-bases obtuse or sagittate below. Achenes trigonous. Pappus of 2-3 stout barbellate bristles arising from an entire narrow cupule. Worldwide: 10 species in America, some pantropical weeds Zambia: 1 taxon. |
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