Austrocylindropuntia is in the cactus family. They have tuberous roots, cylindrical stems, and round cylindrical leaves about 5″ in length. Eve’s Needle Cactus needs bright lightVery few houseplants should be placed in direct sun. High light refers only to bright indirect light since direct sun often burns the leaves of indoor houseplants. An area that is too hot and dry encourages Spider Mites and causes blooms to quickly fade. A northern exposure really doesn't provide enough light for high light plants. These plants need to be placed directly in front of an east-facing window, within 1-3 feet of a west-facing window, and within 5 ft. of a south facing window. A high light area has over 300 ft. candles of light., cactus soil, and not very much water.