Small tree, to 20 m tall, glabrous except for inconspicuous pubescence on young stems, petioles, and inflorescence branches. Petioles 6-15 mm long; blades oblong-elliptic, acuminate, obtuse to rounded at base, 11-25 cm long, 5-9 cm wide, often with conspicuous pellucid dots in areoles below; midrib and major lateral veins prominently raised below, the major lateral veins connected by numerous parallel, sinuate, tertiary veins mostly at +/- right angles to major laterals, the reticulate veins below anastomosing. Racemes axillary, 15-20 cm long, pendent, sparsely flowered; flowers green, fragrant, mostly bisexual; pedicels stout, ca 8 mm long, +/- perpendicular to rachis; sepals 4 or 5, ovate, 7-9 mm long; petals 4 or 5, +/- oblong or elliptic, about as long as calyx; stamens numerous, yellowish-brown, forming a +/- globular mass; filaments nearly free; stigma 1, +/- sessile, subentire, sticky. Capsules +/- linear, 4-7 cm long, less than 5 mm diam, splitting longitudinally into 2 or 4 segments; seeds many, dark, ellipsoid, ca 0.6 mm long, comose at both ends, the trichomes light brown, 2-3 mm long. Croat 10806. The genus is unusual among the Guttiferae of Panama in having wind-dispersed seeds.