Aidia chantonea Tirveng. - RUBIACEAE

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Botanical descriptions Habitat and ecology Distribution

Botanical descriptions :

Diagnostic characters : Evergreen trees, bark smooth to scaly. Leaves simple opposite with glabrous, domatia. Stipules interpetiolar. Flowers white, corolla tubular. Fruit a drupe.
Habit : Evergreen tree up to 25 m. tall, 30 cm. in DBH.
Trunk & bark : Trunk smooth to scaly flaky, pale greyish-brown, lenticellate, peeling outer bark green, about 3 cm. thick, inner bark pale brown with a few longitudinal white bands, sapwood pale yellow.
Branches and branchlets or twigs : Branches glabrous, strongly lenticellate.
Exudates : Exudate absent.
Leaves : Simple leaves, opposite, elliptic 12-15 x 4-6 cm. in length, apex acuminate or strongly acuminate, base acute to attenuate, margin entire, blade papery to slightly leathery, glabrous on both side.
Midrib slightly raised above, prominent below, domatia on the connection between midrid and secondary veins. Secondary veins oblique to the midrib, closely parallel, 5-7 pairs, tertiary veins reticulate. Some leaves reduced to stipule. Interpetiolar stipule, triangular, about 5-6 mm. long.
Inflorescences or flowers : Inflorescence axillary appearing opposite to the leaf, up to 5 cm. long with 3 main peduncles. Flowers white grouped, pubescent with hairy hypanthium. Flower bud tubular light green.
Fruits : Fruit solitary, drupe, globose not more than 1 cm. in diameter, glabrous. Green then red and then turning black.
Seeds : Seeds numerous. .

Habitat and ecology :

In semi evergreen forest open degraded forests from 500 to 600 m. altitude.

Distribution :

South-East Asia, Malaysia, Myanmar, Thailand, Vietnam and Laos.

Remark/notes/uses :
The yellow coloured wood is used for inlay-work. The bark is used medicinally in the treatment of nettle-rash and fever.

Specimens studied :
Lao 207, Lao 197, BT 112, BT 149, BT 151, BT 456, BT 856, BT 870 (Herbarium of Faculty of Sciences-NUoL, NHN-Leiden and CIRAD-Montpellier).

Literature :
Lehmann L., M. Greijmans and D. Shenman. 2003. Forests and trees of the central highlands of Xieng Khouang Lao PDR, A field guide. Lao Tree Seed Project, Vientiane, Laos.

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