The deeply incised leaf lobes of Pelargonium radens often show the conspicuously sunken veins along the centre of each narrow lobe.
The five petals are any of a series of shades of pale pink. The flowers are about 2 cm in diameter.
The upper pair of petals, bigger and obovate to club-shaped, have pink-purple blotches and lines in two colours in their lower halves.
The three smaller, round-tipped petals completing the laterally symmetrical corolla below the flower centre are unmarked and of similar colour as the upper ones (Vlok and Schutte-Vlok, 2015; iNaturalist).