Amelanchier australis is a branching shrub up to 2 m (80 inches) tall. Leaves are thick and leathery, ovate to oblong, up to 3.2 cm (1.3 inches) long, the upper side green with small hairs, the underside more densely hairy. Flowers are born in a raceme of 6-15 flowers at the end of branches. Calyx lobes are green, persistent in fruit, up to 5 mm (0.20 inches) long. Petals are narrow oblong, up to 6 mm (0.24 inches) long. Fruits are spherical, about 6 mm (0.24 inches) in diameter.