Ostryocarpus is genus of flowering plants in the family Fabaceae.

[2] The first specimens were collected by Theodore Vogel in 1851 on the Niger Expedition to West Africa.

It is related to the genus Lonchocarpus and is distinguished from it by its diadelphous stamens and shell-like pod.

Ostryocarpus has glabrous exstipellate stamens, short stalked flowers on special short branchlets, hooked wings and keel petals and a short 2–3 ovuled gynoecium surrounded at the base by a fimbriate disk which is usually adnate to the base of the calyx.

[3] Ostryocarpus is found in the tropical rainforests and seasonally dry forests of the Guineo-Congolian region of tropical West and west-central Africa.