Trees to 30 m tall, unarmed, terrestrial, without raphides in the tissues. Leaves opposite, petiolate, entire, with the higher-order venation not lineolate, sometimes with pubescent domatia; stipules interpetiolar, triangular, erect and valvate in bud, caducous to persistent. Inflorescences terminal and in axils of uppermost leaves, thyrsiflorm or paniculiform to corymbiform, mutiflowered, pedunculate, bracteate. Flowers pedicellate, bisexual, homostylous, protandrous, small, perhaps fragrant, apparently diurnal; hypanthium obconic to obovoid; calyx limb developed, 4-lobed, without calycophylls; corolla salverform, white to cream, rather small (2.5-3 mm long), pubescent inside, lobes 4, triangular, valvate or perhaps thinly mbricated in bud, without appendage; stamens 4, inserted in upper part of corolla tube, anthers narrowly oblong, dorsifixed, dehiscent by linear slits, exserted, without appendage; ovary 2-locular, with ovules 1 per locule, apical and pendulous, stigma 2, linear to ellipsoid, exserted. Fruit samaroid, dry, papery to spongy, obovoid, flattened, indehiscent or tardily with 2 valves, with calyx limb persistent; seeds 1 per locule, obconic, laterally flattened.