Delissea rhytidosperma, a member of the Campanulaceae (bellflower) family, is a branched shrub 0.5 to 2.5 m (1.6 to 8.2 ft) tall. The lance-shaped or elliptic leaves are 8 to 19 cm (3.1 to 7.5 in) long and 2 to 5.5 cm (0.8 to 2.2 in) wide and have toothed margins. Clusters of 5 to 12 flowers are borne on stalks 1 to 2 cm (0.4 to 0.8 in) long, each flower has a stalk 8 to 13 mm (0.3 to 0.5 in) long. The greenish-white (sometimes pale purple) corolla is 14 to 20 mm (0.6 to 0.8 in) long. The stamens are hairless, except for a small patch of hair at the base of the anthers. The nearly spherical dark purple fruits are 7 to 12 mm (0.3 to 0.5 in) long and contain numerous white seeds.