Mitrephora alba

It is a tree reaching 12 meters (39 ft) in height. Its branches have gray bark and are sparsely covered in fine pale brown hairs. Its leathery, oval to lance-shaped leaves are 6–18 by 3–6.5 centimeters (2.4–7.1 by 1.2–2.6 in) with pointed to tapering tips and rounded or pointed to shallowly pointed bases. The upper surfaces of the leaves are matt and hairless and the undersides have sparse fine hairs. The leaves have 7–11 pairs of secondary veins emanating from their midribs. Its petioles are 2–6 by 1–2 millimeters and covered in sparse fine hairs. Its inflorescence are composed of up to 3 flowers on a rachis that is covered in pale brown velvety hair. Each flower is born on a fleshy pedicel that is 10–16 by 0.7–0.9 millimeters and densely covered in fine brown hairs. Oval bracts at the base of pedicels are 1–1.5 by 1 millimeters while those at top are 1–1.5 by 1–1.5 millimeters. Its oval to triangular sepals are 1.5–2.5 by 2.5–3 millimeters. The outer surfaces of the sepals have sparse, fine, brown hairs; the inner surfaces are hairless or nearly so. Its flowers have 6 petals in two rows of three. The white, oval, outer petals are 13–21 by 10–16 millimeters with pointed tips and wavy margins when mature. Both surfaces of the outer petals are sparsely covered in fine hairs. …

It has been observed growing in evergreen moist forests at elevations of 0 to 70 meters (230 ft).

Bioactive diterpenes extracted from its branches have been reported to have moderate cytotoxic activity in test with cultured human lung cancer cells.

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