Goodenia hederacea is a prostrate or ascending, perennial herb with stems up to 80 cm (31 in) long. The leaves are linear to elliptic or round, 10β120 mm (0.39β4.72 in) long and 3β25 mm (0.12β0.98 in) wide on a petiole up to 40 mm (1.6 in) long. The flowers are arranged in racemes up to 80 cm (31 in) long on a pedicel up to 50 mm (2.0 in) long with linear bracteoles 3β5 mm (0.12β0.20 in) long. The sepals are linear to lance-shaped, 3β5 mm (0.12β0.20 in) long, the corolla 8β15 mm (0.31β0.59 in) long with cottony hairs on the back. The lower lobes of the corolla are 3.5β7 mm (0.14β0.28 in) long with wings up to 2 mm (0.079 in) wide. The fruit is an oval capsule 5β9 mm (0.20β0.35 in) long.