(n) genus of slender often treelike spiny cacti with solitary showy nocturnal white or pink flowers; Florida and Caribbean to South America, Syn. genus Harrisia
prop. n. (Bot.) A genus of slender often treelike spiny cacti with solitary showy nocturnal white or pink flowers; Florida and Caribbean to South America. Syn. -- genus Harrisia. [ WordNet 1.5 ]