The olive tree is an evergreen tree or shrub native that grows in a short and squat shape, and rarely grows taller than 8–15 m. The silvery green leaves are small and oblong. The trunk is typically gnarled and twisted. The small white, feathery flowers generally grow on the previous year's wood. The fruit is a small drupe with thin flesh and are smaller in wild plants than in orchard cultivars. Olives are harvested in the green to purple stage. Olives contain a seed commonly referred to in American English as a pit or a rock, and in British English as a stone.