Cereus is a genus of cacti including around 33 species of large columnar cacti from South America. The name is derived from Greek and Latin words meaning "wax", "torch" or "candle". Cereus was one of

Selenicereus, from Ancient Greek σελήνη, meaning "moon", and Latin cēreus, meaning "candle", sometimes known as moonlight cactus, is a genus of epiphytic, lithophytic, and terrestrial cacti, found in