Peltophorum dasyrhachis (Miq.) Kurz - CAESALPINIACEAE

Basionym : Caesalpinia dasyrrhachis Miq.

Synonym : Baryxylum dasyrrhachis (Miq.) Pierre

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Botanical descriptions Habitat and ecology Distribution

Botanical descriptions :

Diagnostic characters : Deciduous trees, with large deeply dissected (antler-like) stipules and yellow, large flowers, fruit a pod tapering on both sides, with two long narrow wings, not splitting.
Habit : Deciduous tree up to 30 m tall.
Trunk & bark : Bole straight or leaning, bark greenish-brown, smooth, often with lenticels.
Branches and branchlets or twigs : Twigs angular, glabrous, hairy when young.
Exudates : Exudate absent.
Leaves : Leaves compound, bipinnate, alternate and spiral, leaflets oblong, apex slightly emarginated, base asymmetrical, margin entire.
Stipules persistent, deeply dissected antler-like.
Inflorescences or flowers : Flowers arranged in a many-flowered inflorescence, axillary, bisexual, pedicels longer than 0.5 cm.
Fruits : Fruit a pod up to 3.5 cm long, tapering on both sides, with two long narrow wings, not splitting.
Seeds : Seeds 4-8.

Habitat and ecology :

Not common in deciduous forest, but often planted along road sides.

Distribution :

Cambodia, Indonesia (Sumatra), Malay Peninsula, Vietnam, Laos (Khammouan).

Remark/notes/uses :
The wood is termite resistant and is used for construction and for house pillars.The tree is widely planted due to its shape and beautiful flowers.

Specimens studied :
BT 96, BT 483, BT 641, BT 722, BT 1043, LAO 637 (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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