Chionanthus rugosus

Chionanthus rugosus grows as a tree up to tall, with a trunk diameter of up to . The bark is greyish. The fruit is green, ovoid, up to long. The specific epithet "rugosus" is from the Latin meaning "rough", referring to the fruit. Its habitat is lowland mixed dipterocarp forest. "C. rugosus" is endemic to Borneo.