Cyathocalyx ridleyi (PROSEA)

Plant Resources of South-East Asia
Introduction

Cyathocalyx ridleyi (King) J. Sinclair

Family: Annonaceae

Synonyms

Peninsular Malaysia, Singapore and Borneo.

The flowers smell like Cananga flowers and could be similarly used.

Tree, up to 7 m tall with tomentose branches.
Leaves alternate, thinly coriaceous, softly tomentose beneath; petiole up to 2.5 cm long; blade obovate-elliptical, 15-25 cm × 7.5-9.5 cm, beneath with prominent veins.
Flowers extra-axillary on stout branches, 2-5 together, fragrant, green; pedicel 6-8 mm long; sepals 3, ovate, 8 mm long; petals 6, filiform, up to 10 cm long, greenish-yellow; stamens numerous; ovary ovoid, 4-6-ovuled, silky.
Fruit apocarpous, monocarps ellipsoid, 2-3 cm long.
Seed with ruminate endosperm.

C. ridleyi occurs mainly in dense moist forest at low altitudes and is rather rare.

Burkill, I.H., 1935. A dictionary of the economic products of the Malay Peninsula. 2 volumes. Crown Agents for the Colonies, London, United Kingdom. 2402 pp. (slightly revised reprint, 1966. 2 volumes. Ministry of Agriculture and Cooperatives, Kuala Lumpur, Malaysia. 2444 pp.).
Ridley, H.N., 1922-1925. The flora of the Malay Peninsula. 5 volumes. Government of the Straits Settlements and Federated Malay States. L. Reeve & Co., London, United Kingdom.
Sinclair, J., 1955. A revision of the Malayan Annonaceae. The Gardens' Bulletin, Singapore 14: 149-516.
Whitmore, T.C. & Ng, F.S.P. (Editors), 1972-1989. Tree flora of Malaya. A manual for foresters. 4 Volumes. 2nd Edition. Malayan Forest Records No 26. Longman Malaysia Sendirian Berhad, Kuala Lumpur, Malaysia.

P.C.M. Jansen