Goniothalamus ridleyi

[4] Its papery to membranous, elliptical leaves are 14-29 by 3.5-11.4 centimeter, have short tapering tips and bases that come to a point where they meet the petioles.

The leaves have about 6-19 pairs of secondary veins that emanate from their midribs that curve near the leaf margin.

Its flowers occur in crowded clusters on long pedicels that extend from warty outgrowths, or tubercle, that grow from the base of the trunk close to soil level.

Its purple to brown, leathery, oval to triangular sepals are 9–1.35 by 6-9 millimeters, sparsely covered in fine hairs, with bluntly pointed tips.

The cream-colored to pale brown, leathery, oblong to oval outer petals are 1.2-5 by 0.9-2 centimeters, have broad thick claws, come to shallow point at their tips.

The cream-colored to pale brown, leathery, teardrop-shaped inner leaves are 1.1-1.7 by 0.7-0.95 centimeters, taper to a short slender point at their tips, and have claws that are 1.5-2.4 millimeters wide.