Stemodiopsis rivae Engl.

Much-branched perennial herb, up to c. 15 cm tall. Stems 4-angled, procumbent, up to 35 cm long covered in short stiff whitish hairs. Leaves ovate, up to 18 mm long, covered in short stiff whitish hairs; margin coarsely toothed. Flowers solitary in the upper leaf axils; corolla hairy, white, purple in the throat, up to 11 mm long. upper lip c. 3 mm long, triangular-ovate; lower lip c. 4 × 4.5 mm, 3 lobed. Capsule c. 5 mm long, beaked, pale brown, minutely hairy.

Sudan, Uganda, Kenya, Tanzania, Malawi, Mozambique, Zambia, Zimbabwe and Mpumalanga, South Africa.