Genus Harrisia, a group of cacti belonging to the family Cactaceae, is also often referred to as the "candle cactus" or "moon cactus". These synonyms arise from the cylindrical shape of the plant, which resembles a candle, and the nocturnal flowering pattern of some species, which blooms under the moonlight. In addition, the genus is sometimes called the "desert rose" due to its attractive, rose-like flowers. Other synonyms for Genus Harrisia include "spiny cactus" and "hedgehog cactus", reflecting the sharp spines that cover the plant's surface, and its resemblance to hedgehogs. These various names reflect the unique and striking characteristics of this plant, which make it a popular choice for both ornamental and medicinal purposes.