Didymoplexis africana Summerh., Kew Bull. 6: 465 (1951 publ. 1952).
Description:

Leafless, glabrous saprophytic herb; tubers up to 4 × 0.7 cm, fusiform. Scape slender, 8–21 cm high. Stem with 2–3 sheathing cataphylls c. 2 mm long near base. Inflorescence densely 1 to many-flowered. Flowers spreading or erect, white or cream flushed with pink. Ovary and pedicel 10 mm long at anthesis. Tepals connate for about half their length forming a bilabiate tube. Dorsal sepal erect, 15 × 3.5–4 mm, subspathulate, joined to petals for c. 7.5 mm. Lateral sepals 10.5–12 × 3.25–3.5 mm, subspathulate, joined to each other for 7.5 mm and to petals for 4.5 mm. All sepals verrucose outside. Petals 10.5–12 × 3.5–4.5 mm. Lip free, 10–11 × 5.5 mm, clawed at base then flabellate-orbicular, erose-denticulate at margin with a transverse fleshy callus below apex and a reflexed, ligule-like callus at apex of claw. Column c. 10 mm long, straight, with tridentate apex. Anther hemispherical; pollinia 4, ovoid. Rostellum fleshy.
Habitat:

In deep shade in leaf litter of submontane evergreen forest up to c. 800 m.
Distribution:

W. Trop. Africa to Tanzania