Scrambling, ± climbing shrub. Leaves opposite. Capitula
discoid, 10-40-flowered in corymbs. Involucral bracts imbricate with a
coloured apex. Receptacle flat or convex, sometimes with
scales. Corolla white or pale blue. Achenes bristly,
with (3-)5 ribs. Pappus of many persistent, capillary
bristles. Worldwide: 165 species in tropical and warm America; one species (odorata) a weed in the Old World Zimbabwe: 1 taxon. |
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