Cyathocalyx

Cyathocalyx is a small genus with about 22 species distributed from southern India, Sri Lanka, through Malaysia, Indomalayan islands and reaches as far as Fiji in the South Pacific.

The salient features of the genus includes- monopodial trees, supra-axillary or nearly leaf-opposed inflorescences, six petals which are basally concave and constricted above the reproductive organs to form a "pollination chamber".

The genus consists 22 identified species with two unresolved species.

Species

 * Cyathocalyx acuminatus C.B.Rob. peninsular malaysia
 * Cyathocalyx annamensis  Ast.
 * Cyathocalyx apoensis (Elmer) J.Sinclair
 * Cyathocalyx cauliflorus K.Schum. & Lauterb.
 * Cyathocalyx crassipetalus R.J.Wang & R.M.K.Saunders
 * Cyathocalyx filiformis Ast.
 * Cyathocalyx globosus Merr.
 * Cyathocalyx hexagynus (Miq.) R.J.Wang & R.M.K.Saunders
 * Cyathocalyx kingii Boerl. ex Koord. Peninsular malaysia
 * Cyathocalyx lucidus Diels
 * Cyathocalyx maingayi Hook. f. & Thomson peninsular malaysia
 * Cyathocalyx magnifica *peninsular malaysia
 * Cyathocalyx magnifructus R.J.Wang & R.M.K.Saunders. malaysia (sbh.srwk)
 * Cyathocalyx martabanicus  Hook.f. & Thomson
 * Cyathocalyx minahassae Koord.
 * Cyathocalyx obtusifolius Becc. & Scheff.
 * Cyathocalyx olivaceus (George King (botanist)King) J.Sinclair peninsular malaysia
 * Cyathocalyx petiolatus  Diels. Peninsular malaysia
 * Cyathocalyx polycarpa C.T.White & W.D.Francis
 * Cyathocalyx pubescens Scheff.
 * Cyathocalyx samarensis R.J.Wang & R.M.K.Saunders
 * Cyathocalyx scortechinii (King) J.Sinclair. peninsular malaysia
 * Cyathocalyx sumatranus Scheff.
 * Cyathocalyx vitiensis A.C.Sm.
 * Cyathocalyx zeylanicus Champ. ex Hook.f. & Thomson. Peninsular malaysia

Unresolved species

 * Cyathocalyx harmandii  (Finet & Gagnep.) R.J.Wang & R.M.K.Saunders
 * Cyathocalyx maingayi  Hook.f. & Thomson