Fraxinus floribunda Wall. - OLEACEAE

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Botanical descriptions Habitat and ecology Distribution

Botanical descriptions :

Diagnostic characters : Deciduous trees. Twigs quadrangular, buds black. Leaves imparipinnate, Leaves and leaflets opposite, 3 pairs leaflets, margin dentate. Inflorescence terminal, flowers white, unisexual, male and female on different trees. Fruit a winged samara.
Habit : Briefly deciduous tree up to 25 m tall.
Trunk & bark : Bole straight, sometimes leaning, bark dark brown, deeply fissured.
Branches and branchlets or twigs : Twigs quadrangular, glabrous, thickened at nodes.
Exudates : Exudate absent.
Leaves : Leaves compound, opposite, imparipinnate, leaflets ovate, apex acuminate to caudate, base acute, margin finely toothed.
Midrib flat above, secondary veins obtuse, widely parallel, tertiary veins reticulate.
Stipules absent.
Inflorescences or flowers : Flowers arranged in a many-flowered inflorescence, terminal, appearing with young leaves, unisexual, on different trees, pedicels less than 0.3 cm long. .
Fruits : Fruit samara, up to 3.5 cm long, winged at one end.
Seeds : Seed 1.

Habitat and ecology :

Uncommon in hill evergreen forest, often along streams.

Distribution :

Afghanistan, Pakistan, throughout the Himalayas to North Burma (Myanmar), Laos (Khammouan).

Remark/notes/uses :
The timber can be used in construction, the juice of the stem is used as manna, a sweetener.

Specimens studied :
BT 514, BT 918, LAO 1255, LAO 1489 (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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