Gymnanthemum

Small trees. Stems caulescent. Leaves simple, alternate, petiolate, lamina ovate, or elliptic, pubescent, margin serrate, apex acuminate, base attenuate, chartaceous. Capitulescences terminal or axillary, corymbose. Capitula discoid, homogamous, pedunculate. Florets bisexual and fertile. Involucre herbaceous, persistent, apex obtuse. Corolla purple to white, actinomorphic; lobes 5. Anthers 5, syngenesious. Styles purple, 2-branched, inner surface covered with stigmatic papillae, outer surface covered with sweeping hairs reaching to below style bifurcation. Achenes subterete or obovate, usually 10-ribbed, carpopodium present. Pappus in 2 series of bristles, persistent, the outer ones are shorter than the inner ones. Pollen subechinolophate, 3-colporate, with prominent micropuncta. One species is recognized in Thailand.

Gymnanthemum is a genus of Asian, African and South American plants in the tribe Vernonieae within the family Asteraceae.

Species Gymnanthemum amygdalinum Gymnanthemum andrangovalense Gymnanthemum antanalum Gymnanthemum appendiculatum Gymnanthemum auriculiferum Gymnanthemum baillonii Gymnanthemum baronii Gymnanthemum bellinghamii Gymnanthemum bolleanum Gymnanthemum carnotianum Gymnanthemum chapelieri Gymnanthemum coloratum Gymnanthemum corymbosum Gymnanthemum coursii Gymnanthemum crataegifolium Gymnanthemum cylindriceps Gymnanthemum delapsum Gymnanthemum dissolutum Gymnanthemum exsertiflorum Gymnanthemum exsertum Gymnanthemum extensum Gymnanthemum fimbrilliferum Gymnanthemum glaberrimum Gymnanthemum hispidulum Gymnanthemum humblotii Gymnanthemum koekemoerae Gymnanthemum louvelii Gymnanthemum mespilifolium Gymnanthemum metzianum Gymnanthemum myrianthum Gymnanthemum pectorale Gymnanthemum platylepis Gymnanthemum pleistanthum Gymnanthemum rubicundum Gymnanthemum rueppellii Gymnanthemum secundifolium Gymnanthemum subcrassulescens Gymnanthemum theophrastifolium Gymnanthemum thomsonianum Gymnanthemum triflorum Gymnanthemum urticifolium Formerly included

numerous species now regarded as members of other genera: Acilepis Decaneuropsis Eremosis Kinghamia Monosis Phyllocephalum Strobocalyx Vernonia