Pygmaecereus

Pygmaeocereus bylesianus is a diminutive cactus with short, dense rust-coloured spines and remarkably beautiful white nocturnal flowers which open for just a single night.

Pygmaeocereus familiaris is one of the smallest cactus, that in nature forms cushions with many green stems usually less than to 2 centimeters in length. The funnel-shaped, white flowers are up to 8 cm long and strongly perfumed.