Protomegabaria stapfiana is a species of plant in the family Phyllanthaceae.

[1][3][4] P. stapfiana can be found in Angola, Cameroon, Democratic Republic of the Congo, Republic of the Congo, Ivory Coast, Equatorial Guinea, Gabon, Ghana, Liberia, Nigeria, São Tomé and Príncipe, and Sierra Leone.

[1][3][4][5] P. stapfiana is a shrub to medium-sized tree growing to 15–18 m (49–59 ft) tall and 22 cm (8.7 in) in diameter, sometimes with buttresses.

Branches are glabrous, though branchlets are usually covered in fine hairs.

The leaves are oblong to elliptic, typically measuring 16–28 cm (6.3–11.0 in) by 5–10 cm (2.0–3.9 in), glabrous above, pubescent when young but becoming glabrous with age beneath.