Shark Tooth Orchid CactusBotanical Name: Epiphyllum chrysocardium Common Names: Fern leaf cactus, golden heart epiphyllum, shark tooth cactus and shark fin cactus. Description: It is known for its triangular stacked leaves that create a symmetrical pattern all around the stems. These grow green near the stem and turn red as they grow out, especially when they have adequate exposure to sunlight, creating a beautiful contrast.