Strobocalyx

Perennial plants. Stems arborescent or scandent. Leaves simple, alternate, usually petiolate, lamina elliptic or oblong, pubescent with uniseriate or flagellate hairs, margin serrate or entire, apex acute or acuminate, base cuneate, coriaceous. Capitulescences terminal or axillary. Capitula discoid, homogamous, pedunculate or sessile, florets bisexual and fertile. Involucre campanulate, in 2–4 series, 2–4 mm long. Phyllaries imbricate, hairy without glands. Corollas 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 on the outer surface reaching below style bifurcation. Achenes turbinate, usually 10-ribbed, ca. 2 mm long, hairy with glands, carpopodium present. Pappus in 2 series of bristles, persistent, the outer ones are shorter than the inner ones. Pollen echinate, subechinolophate or echinolophate, 3-colporate, with micropuncta. Two species are recognized in Thailand.

Strobocalyx is a genus of Asian, African, Pacific Island, and South American plants in the tribe Vernonieae within the family Asteraceae. It is sometimes regarded as part of the genus Vernonia.

Species Strobocalyx arborea Sch.Bip. - Indian Subcontinent, Southeast Asia, southern China Strobocalyx bockiana (Diels) H.Rob., S.C.Keeley, Skvarla & R.Chan - southern China Strobocalyx chunii (C.C.Chang) H.Rob., S.C.Keeley, Skvarla & R.Chan - Hainan Strobocalyx glandulosa (DC.) Sch.Bip. - Venezuela Strobocalyx insularum Sch.Bip. - Fiji Strobocalyx pyrrhopappa Sch.Bip. - Philippines Strobocalyx solanifolia (Benth.) Sch.Bip. - southern China, India, Indochina Strobocalyx sylvatica (Dunn) H.Rob., S.C.Keeley, Skvarla & R.Chan - southern China Strobocalyx vidalii (Merr.) H.Rob., S.C.Keeley, Skvarla & R.Chan - Philippines formerly included

numerous species now regarded as members of other genera: Brenandendron Decaneuropsis Monosis Tarlmounia

Strobocalyx doniana - Brenandendron donianum Strobocalyx elaeagnifolia - Tarlmounia elliptica Strobocalyx elliptica - Tarlmounia elliptica Strobocalyx esculenta - Vernonia esculenta Strobocalyx obovata - Decaneuropsis obovata Strobocalyx wightiana - Monosis wightiana