1992
McIntosh, L. 1992. Field notebook of Laird McIntosh.
U92MCI02NMUS
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Escobaria villardii
McIntosh, L. 1992. Field notebook of Laird McIntosh.
Howard, M. 1991. Sensitive threatened and endangered plant data form. May 8, 1991.
McIntosh, L. 1992. Alamogordo south field map for Escobaria villardii. April 21, 1992.
Castetter, E. F., P. Pierce, and K. H. Schwerin. 1975. A reassessment of the Genus Escobaria. Cactus and Succulent Journal. Vol XLVII. 60-70 pp.
Mehlhop, P., E. DeBruin, et al. 1998. Sensitive species management plans for Holloman Air Force Base, New Mexico. Unpubl. report by New Mexico Natural Heritage Program. 347 p. + app.
Sivinski, R. 1995. Status report for Villard's pincushion cactus (Escobaria villardii: Cactaceae).
Clayton, P. 1987. Data form for Escobaria villardii. Las Cruces- Mimbres Resource Area, Las Cruces District, BLM. October 16, 1987. Also, note of collection (3-11-88) attached w/corrections.
Lee-Chadde, S. and L.F. Huenneke. 1997. A handbook of rare, threatened and endangered plant species of the Sacramento Mountains. Dept. of Biology, New Mexico State University, Las Cruces, NM 88003. Draft. pp. 109.
McIntosh, L. 14 MAY 1992. Computer generated map of Escobaria villardii locations on Alamogordo South, NM 7.5 min topographic map. BLM District Office, Las Cruces.
Zimmerman, A. D., and B. D. Parfitt. 2006. Flora of North America. Volume 4. Pages 236-237.