Cactus (scientific name: Opuntiastricta (Haw.) Haw. var. dillenii (Ker-Gawl.) Benson ), is a plant of the genus Cactus. It is also known as Cactus, Guanyin palm, Overlord, Fire palm, etc. It is a plant of the Cactaceae family. The cactus is a clump of fleshy shrubs, the upper part of the branches are broadly obovate, obovate-elliptic or suborbicular; the flowers are rotate, the receptacle is obovate.