Cyathocalyx

Cyathocalyx
Cyathocalyx sumatranus
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Magnoliids
Order:	Magnoliales
Family:	Annonaceae
Subfamily:	Ambavioideae
Genus:	Cyathocalyx Champ. ex Hook. f. & Thomson
Species
22, see text.

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.[1]

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.[2]

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

References

1. Wang, R.J and Saunders, R.M.K.S (2006) A synopsis of Cyathocalyx species (Annonaceae) in Peninsular Malaysia, Sumatra, and Borneom with descriptions of two new species. Botanical Journal of the Linnean Society. 152,513-532.
2. "Cyathocalyx — the Plant List".