Medium sized tree, deciduous with few aerial prop roots; leaves membranous, spirally arranged, ovate to elliptic, shortly acuminate at apex, rounded to slightly cuneate at base, edges entire or often sinous, thinly coriaceous; petioles long, sometimes indistinctly jointed with blade; stipules broadly ovate, receptacles axillary in pairs, sessile, globose, white, flushed with yellow or red and dotted when ripe; male flowers ostiolar, sessile in 2-3 rings, tepals 2-3 ovate; stamen-1; gall flowers shortly pedicelled or sessile, tepals 3-4, reddish, spathulate; female flowers sessile tepals 3-4, ovary reddish; achenes smooth.