Hermannia transvaalensis is a perennial that grows long, trailing stems from an underground woody rootstock to heights of about 30 cm to 50 cm.
The alternate, simple leaves are widely spaced. The leaf-shape is broadly oval, its base heart-shaped and the tip rounded. The blades are coarsely surfaced often tinged bronze. The leaf margins are roughly toothed. There are sparsely scattered hairs split into star-shapes all over the plant.
The inflorescence is a two-flowered cyme, i.e. the upper flower opening first. The inflorescence is erect. The flowers are spaced and hairy-stalked, the apricot-coloured to yellow corollas pendulous. Bloomtime is spring until after midautumn.
The species distribution is in Gauteng, Mpumalanga, Free State, and KwaZulu-Natal.
The habitat is grassland. The habitat population is deemed of least concern early in the twenty first century (Van Wyk, and Malan, 1997; Germishuizen and Fabian, 1982; www.sntc.org.sz; http://redlist.sanbi.org).