Echinopsis

Echinopsis is a large genus of cacti native to South America, also known as hedgehog cactus, sea-urchin cactus, or Easter lily cactus. The flowers are funnel-shaped, with hairy scaled floral tubes which give rise to hairy, globular fruit filled with a soft, mushy pulp. It seldom lasts more than a single day and maybe diurnal or nocturnal depending on the species.