The inflorescence of Pelargonium radens is an umbel-like cluster of up to eight flowers on a peduncle that emerges from an upper leaf axil.
The five petals of each flower are pale pink or magenta in one of several shades. The flowers are about 2 cm in diameter, the calyx tube up to 8 mm long. 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, of similar colour as the upper ones.
The deeply incised leaf lobes of show the conspicuously sunken veins along the centre of each narrow lobe (Euston-Brown and Kruger, 2023; Vlok and Schutte-Vlok, 2015; Bond and Goldblatt, 1984; iNaturalist).