Fishbone Cactus. An Epiphyte originating from the tropical rainforests of Chiapas, Mexico. In the night-blooming cactus family, with enough bright light in early spring and roots that are a bit crowded, it might flower in March or April for a day. Wants bright warm spot, but protected from direct hot sun. Well drained soil. Likes humidity. Careful of overwatering. Once a week, in spring and summer, fertilize. Pot up during spring or summer.