Brachystelma coddii has dark green to blue-green, opposite leaves. They are ovate in shape and finely hairy. The margins are entire and faintly purplish. The leaf apices attenuate or are rounded while the leaf base is rounded to lobed. The leaves grow on short petioles from branched, purplish and prostrate, creeping stems.
The flower of Brachystelma coddii is star-shaped with five corolla lobes that have long narrow, attenuating tips. The corolla is cream coloured and hairy with scattered maroon, velvety or red spots. The corolla margin and lobe tips are also dark maroon.
The follicle, the fruit, is solitary, tapering to a beak (Fabian and Germishuizen, 1982).