Goodenia disperma is an erect undershrub with few branches and that typically grows to a height of. The leaves are linear and arranged on the stem, long and wide. The flowers are arranged in racemes up to long with leaf-like bracts at the base, each flower on a pedicel long. The sepals are linear to lance-shaped with the narrower end towards the base, long and the corolla is white and about long. The lower lobes of the corolla are long with wings about wide. Flowering occurs from November to May and the fruit is an oval capsule about long.