Arthrophyllum

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Arthrophyllum

Description

Unarmed, sparingly branched trees or shrubs. Leaves on vegetative shoots and lower leaves spirally arranged, imparipinnate, often crowded at the end of the branches, those on flowering branches often opposite, smaller, or reduced to a single leaflet; Inflorescence consisting of compound umbels, either solitary and terminal or more commonly borne on a cluster of specialized leafy branches arising from the axils of the uppermost leaves; Flowers bisexual. Petals 4-6, valvate in bud. Stamens 4-6, anthers curved, basifixed. Ovary turbinate, 1-celled; Fruit ovoid or spheroidal, often oblique; Seed solitary, pendulous;

Distribution

Asia-Tropical:, New Guineapresent; Philippines (Philippinespresent) New Caledonia: present Nicobar Is: present
About 31 spp. (17 in Malesia) extending from the Nicobar Is. and Indo-China to the Philippines, New Guinea and New Caledonia. .

Notes

The principal distinctive characters of this isolated genus are the single-celled ovary and the arrangement of the umbels on specialized lateral branches in the majority of the species.
The present treatment, following that which I gave in 1977, l.c., remains tentative until widespread field studies can be undertaken.

Citation

Harms - in E. & P., Nat. Pfl. Fam. 3. 1894: 54
Koord. - in Atlas. 1916: f. 675 & 676
Miq. - in Ann. Mus. Bot. Lugd.-Bat. 1863: 27
Stone - in Gard. Bull. Sing. 1977: 276
Philipson - in Gard. Bull. Sing. 1977: f. 1-16
Hutch. - in Gen. Fl. Pl. 1967: 80
DC. - in Prod. 1830: 266
Bl. - in Adansonia. 1978: 329
Bth. - in B. & H., Gen. Pl. 1. 1865: 944