Ayensu, E.S. and R.A. DeFilipps. 1978. Endangered and Threatened Plants of the United States. Smithsonian Institution and World Wildlife Fund, Washington, DC xv + 4O3 pp.
Densmore, R. 1987. Status Report on Stahlia monosperma (Cobana Negra) in Southwestern Puerto Rico. Unpublished Report Submitted to the Caribbean Field Office, U.S. Fish and Wildlife Service, Boqueron, Puerto Rico.
Departamento del Interior. U.S. Fish and Wildlife Service. 5 de abril 199O. Endangered and Threatened Wildlife and Plants: Determination of Threatened Status for Stahlia monpsperma (Cobana Negra). Federal Register 55:66:1279O-12792.
Departamento de Recursos Naturales. Natural Heritage Program. 1988. Status Information on Stahlia monosperma in Puerto Rico and Adjacent Islands, San Juan, Puerto Rico.