Harpullia arborea (Blanco) Radlk. - SAPINDACEAE

Basionym : Ptelea arborea Blanco

Synonym : Harpullia condorensis Pierre
Harpullia tomentosea Ridley

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Botanical descriptions Habitat and ecology Distribution

Botanical descriptions :

Diagnostic characters : Evergreen trees, trunk fluted, bark smooth, twigs glabrous. Leaves paripinnate, leaflets opposite, 2-6 pairs, base asymmetric, domatia glabrous. Flowers axillary, unisexual on different trees, greenish-yellow. Fruit a deeply lobed capsule. Seeds 2 enclosed at the base with deeply lobed orange aril.
Habit : Evergreen tree up to 35 m tall.
Trunk & bark : Bole straight, slightly fluted at base, bark grey, smooth or with few lenticels.
Branches and branchlets or twigs : Twigs terete, hairy.
Exudates : Exudate absent.
Leaves : Leaves compound, alternate and spiral, paripinnate, leaflets narrowly ovate to elliptic, apex acute, base asymmetric, often with glabrous domatia.
Midrib flat above, secondary veins oblique, widely parallel, tertiary veins reticulate.
Stipules absent.
Inflorescences or flowers : Flowers arranged in a many-flowered inflorescence, axillary or on leafless twigs, unisexual, pedicels up to 3 mm long.
Fruits : Fruit capsule, up to 6.5 cm in diameter, deeply lobed.
Seeds : Seeds 2, enclosed with an orange aril at base.

Habitat and ecology :

Common in evergreen forest below 1000 m altitude.

Distribution :

India (North and East), Burma (Myanmar), Malesia, Australia (North Queensland), Sri Lanka, Thailand, Indochina, Laos (Khammouan).

Remark/notes/uses :
The bark is used as protection against leeches and as fish poison, oil from the seeds is used as remedy against rheumatism.

Specimens studied :
BT 774, BT 782 (Herbarium of Faculty of Sciences-NUoL, NHN-Leiden and CIRAD-Montpellier).

Literature :
Gardner S., Sidisunthorn P. & Anusarnsunthorn V. 2000. A field guide to Forest Trees of Northern Thailand. Kobfai Publishing Project. Bangkok. Thailand.

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