South Florida Ecological Services Office (24 October 2013). "Endangered and Threatened Wildlife and Plants; Determination of Endangered Status for Chromolaena frustrata (Cape Sable Thoroughwort), Consolea corallicola (Florida Semaphore Cactus), and Harrisia aboriginum (Aboriginal Prickly-Apple)". Federal Register. 78 (206): 63796–63821. 78 FR63796