Radermachera ignea (Kurz) Steenis - BIGNONIACEAE

Basionym : Spathodea ignea Kurz

Synonym : Mayodendron igneum (Kurz) Kurz

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Botanical descriptions Habitat and ecology Distribution

Botanical descriptions :

Diagnostic characters : Evergreen or deciduous trees, bark corky, finely fissured with lenticels. Leaves opposite, 2-to 3x pinnate. Rachis swollen at the nodes and base. Stipules absent. Large flowers, orange, rami- or cauli-florous. Fruit a long twisted capsule splitting lengthways.
Habit : Evergreen or deciduous tree up to 20 m tall.
Trunk & bark : Bole straight, bark brown, soft, corky, finely fissured.
Branches and branchlets or twigs : Twigs terete, glabrous. Branches drooping.
Exudates : Exudate absent.
Leaves : Leaves compound, twice -or 3x-pinnate, opposite, leaflets elliptic, apex acute, base acute, margin entire, with scattered dark-green glands below.
Stipules absent.
Inflorescences or flowers : Flowers arranged in a few-flowered inflorescence, on old branches or the main trunk, bisexual, pedicels longer than 0.5 cm.
Fruits : Fruit capsule, up to 45 cm long, slender, twisted, splitting lengthwise.
Seeds : Seeds many, flat with a narrow wing at both ends.

Habitat and ecology :

Scattered in evergreen and deciduous forest.

Distribution :

Burma (Myanmar), China (Yunnan), Thailand, Vietnam, Laos (Khammouan).

Remark/notes/uses :
No uses known, but the plant has potential in horticulture due to its spectacular flowers.

Specimens studied :
BT 381, BT 844, LAO 51 (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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