Pachycereus marginatus

A large, upright cactus, reaching up to 15m in its native range but usually much smaller in cultivation. Stems are deep green, with 5-7 ribs edged with slightly woolly areoles that are often linked together creating a pale-coloured line down the rib. Areoles bear short spines, and on mature plants produce nocturnal white, pink or purple flowers in spring, followed by round reddish fruits. Young plants are often single-stemmed, only branching at the base as they mature