Dysoxylum cyrtobotryum Miq. - MELIACEAE

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Botanical descriptions Habitat and ecology Distribution

Botanical descriptions :

Diagnostic characters : Bark blackish. Leaves compound, rachis not swollen at base, leaflets opposite. Flowers white, bisexual, stamens fused into a tube. Fruit a capsule.
Habit : Evergreen tree up to 15 m. tall, about 25 cm. in DBH.
Trunk & bark : Trunk smooth, bark blackish, inner bark soft, white.
Branches and branchlets or twigs : Branches puberulent.
Exudates : Exudate absent.
Leaves : Paripinnately compound leave, alternate, rachis up to 40 cm. long, petiole up to 7-8 cm. long, leaflets opposite 5-10 pairs, oblong to oblanceolate 3-5 x 10-12 cm. in length, apex acute-acuminate, base rounded asymmetric, acute, margin entire, glabrous on both surface.
The veins prominent below, intramarginate vein, secondary veins oblique about 7-10 pairs. Petiolule very short up to 2-3 mm. long.
Inflorescences or flowers : Inflorescence shorter than leaf, about 15-20 cm. long, axillary panicle. Flowers bisexual, white with cylindrical staminal tubes, pedicels shorter than 5 mm.
Fruits : Fruit is a thick capsule, rounded about 4-5 cm. in diameter, thick walled, glabrous. Greenish-brown when young then red, later dehiscent into segments, 2-4 loci.
Seeds : 4 to 10 seeds, globose, black.

Habitat and ecology :

In evergreen or open degraded forests from 400 to 600 m. altitude, along the river.

Distribution :

Burma (Myanmar), Chine, India, Vietnam and Laos.

Specimens studied :
BT 358 (Herbarium of Faculty of Sciences-NUoL, NHN-Leiden and CIRAD-Montpellier).

Literature :
Dung, Vu Van. 1996. Vietnam Forest Trees. Agriculture Publishing House, Hanoi, Vietnam.

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