Cereus
Cereus is a genus of cacti in the family Cactaceae that includes several tall, columnar species native to the Americas. They occur in arid and semi-arid regions of South America, Central America, the Caribbean, and nearby areas, often on rocky slopes or open scrubland. Most Cereus forms are erect or may branch after injury, with stems that are ribbed and spiny; spine length and density vary among species.
Flowers are typically large and nocturnal, often funnel-shaped and white or pale. They open at night and
In cultivation, cereus species are valued as ornamental cacti in warm climates and in greenhouses. They prefer
Taxonomically, Cereus has undergone revisions, with some former members reassigned to related genera as classification has