Trees to 30 m tall. Branchlets terete. Leaves simple, spiral; margins entire or sometimes lobed on coppice shoots or juvenile plants. Conflorescence terminal or axillary, raceme-like or paniculate; involucral bracts caducous; floral bracts absent. Flowers zygomorphic, bisexual, strongly perfumed. Receptacle straight. Perianth recurved; tepals separating at anthesis. Stamens 4, adnate to perianth; connective short. Hypogynous glands fused into a horseshoe-shaped structure, anterior. Ovary stipitate, glabrous; suture opposite anterior tepal; locule 1; style slender, recurved; pollen presenter a broad, oblique disk; stigma small, ±central; ovules 4. Follicles bilaterally symmetrical, broadly ovate, ±striate, dehiscing along upper suture, 20-30 mm long, 15-20 mm wide. Seeds flat, ±rhomboid, with a narrow marginal wing.
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