Heynea

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Heynea

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Description

Trees. Leaves imparipinnate; rachis compressed, not swollen at points of attachment of leaflets; abaxial surface of leaflets papillate, glandular. Inflorescences corymbose cymes with long peduncles. Petals 4 or 5, ± imbricate. Ovary 2- or 3-locular, each locule 2-ovulate; stylehead 2- or 3-lobed. Fruit a capsule; pericarp with sclereids. Seeds 1 or 2, arillate. 2n = 28.

Distribution

Indochina and southern China present, Indomalesia present
Two species of E and SE Asia: H. velutina How & Chen (Trichilia sinensis Bentv.) of Indochina and southern China, marked by its hairy 2-seeded capsules, and the closely allied H. trijuga, which is a native of Indomalesia.

Taxonomy

Recently amalgamated with Trichilia L., Heynea is distinct in its transversely compressed rachis at leaflet attachment points, its 2-locular ovary and details of its capsule dehiscence, and on isozyme evidence (T.P. Clark & Mabb., l.e.; T.P. Clark, l.e.).

Citation

Harms 1940: p. 117. – In: Engl. & Prantl, Nat. Pflanzenfam., ed. 2, 19bl: t. 31, f. E1 F1
T.D.Penn. 1975: p. 467. – In: Blumea: p.p.
T.P.Clark & Mabb. 1991: Nat. Monsp., h.s.: 582.
T.P. Clark 1991: Stud. Trich.–Walsura Comp.: 285