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Botanical descriptions Ecology Distribution Literatures
| Habit : | Trees up to 5 m tall. |
| Branches and Branchlets : | Branchlets terete, minutely pubescent to glabrous. |
| Leaves : | Leaves simple with opposite, decussate, unequal pairs; petiole to 1.5 cm long, canaliculate; lamina 9.5-19.5 x 2.6-7 cm, elliptic-lanceolate, long acuminate to caudate, base acute or obtuse, margin widely sinuate or dentate, resinous yellow glandular beneath; secondary_nerves 7-10 pairs; tertiary_nerves obliquely_percurrent. |
| Inflorescence / Flower : | Flowers unisexual; inflorescence racemes, shorter than leaves. |
| Fruit and Seed : | Capsules, 3 lobed with hard conical spines, to 1.5 cm across; seeds 1 per lobe. |