Canarium fuscocalycinum is a tree of Borneo in the incense tree family Burseraceae. The specific epithet is from the Latin meaning "dark calyx".
Description Canarium fuscocalycinum grows as a tree up to tall with a trunk diameter of up to . Its twigs are rusty brown. The ellipsoid fruits measure up to .
Distribution and habitat Canarium fuscocalycinum is endemic to Borneo where it is confined to Sarawak. Its habitat is lowland mixed dipterocarp forests.
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