1. Center for Plant Conservation. 1992. Summary of the Texas Rare Plant Task Force Meetings (1989-1992). Center for Plant Conservation, St. Louis, MO.
2. —. 1992. Information poster: “The Center for Plant Conservation.” Center for Plant Conservation, St. Louis, MO.
3. -. 1995. The Risk of Extinction. The Center for Plant Conservation, St. Louis, MO.
4. Cook, F. E. M. and L. H. Hastings. 1992. Botany Data Collection Standards. Paper resented to the International Working Group on Taxonomic Databases for Plant Sciences (TDWG), November 1992.
5. Dahl, K., W. Hodgson, D. House, L. Hernandez, G. Nabhan, S. Susan. 1988. FLORUTIL Conservation Projects Database, Desert Botanical Garden, Phoenix, AZ.