Cladus: Eukaryota
Regnum: Plantae
Divisio: Magnoliophyta
Classis: Magnoliopsida
Ordo: Magnoliales
Familia: Annonaceae
Genus: Cyathocalyx


Cyathocalyx is a small genus with about 36 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".

Species include:

* Cyathocalyx augustipetalus R. J. Wang & R. M. K. Saunders
* Cyathocalyx biovulatus Boerl.
* Cyathocalyx crassipetalus
* Cyathocalyx crinatus
* Cyathocalyx deltoideus
* Cyathocalyx havilandii
* Cyathocalyx hexagynus
* Cyathocalyx insularis A.C.Sm.
* Cyathocalyx magnifructus
* Cyathocalyx pruniferus
* Cyathocalyx pubescens
* Cyathocalyx samarensis


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 Linnaean Society. 152,513-532.

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