Scabrid or hispid-pubescent
annual herb (in ours). Leaves usually alternate,
occasionally opposite, simple. Capitula terminal on the
branches, solitary (in ours). Capitula heterogamous; ray florets
neuter, few or 0; disk florets tubular, fertile. Phyllaries few,
lfy, equalling or exceeding the capitulum. Receptacular
scales boat-shaped, clasping the florets, becoming
contracted above the achene into a ± tubular neck. Achenes
asymmetrically obovoid. Pappus a minute ring or 0. Worldwide: 8 species in tropical and warm regions of America and Africa Botswana: 1 taxon. |
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