The species epitheton is named after Wilhelm Gueinzius, a German naturalist who collected plants in South Africa.

This species is found down the southern African east coast in Malawi, Zimbabwe, Mozambique and South Africa.

[1] Young branches are covered with rust-coloured hairs.

Leaves measure 5.5–13.5 × 3.5–6 cm, more or less lanceolate to ovate, acuminate apex, rounded to cordate at the base, often bullate, and glabrous to pubescent beneath.

Fruit 7–9 × 11–14 mm, somewhat oblong in profile, glabrous, black when ripe.