Fabaceae
Tonne, P. 2008. Status report for Chihuahua Scurf pea (Pediomelum pentaphyllum; Fabaceae). Natural Heritage New Mexico Publ. No. 09-GTR-337. Natural Heritage New Mexico, University of New Mexico, Albuquerque, NM. 26 p.
Barneby, R.C. 1989. Fabales. In A. Cronquist, A.H. Holmgren, N.H. Holmgren, J.L. Reveal, and P.K. Holmgren (eds.). Intermountain flora: Vascular plants of the Intermountain West, U.S.A. Vol. 3, Part B. New York Botanical Garden, Bronx. 279 pp.
Barneby, R.C., and R. Spellenberg. 1987. A new species of Astragalus (Leguminosae) from northwestern New Mexico and adjacent Arizona. Brittonia 39: 188-191.
Knight, P.J. 1981. Status report - Astragalus humillimus. New Mexico State Heritage Program.
Wootten, T. H. 2007. Letter to Ed Roberson, BLM to nominate an Area of Critical Environmental Concern for Pediomelum pentaphyllum. 2007. T&E Inc. Gila, New Mexico. 2 p.
Tonne, P. 2000. Status report for Chihuahua Scurfpea (Pediomelum pentaphyllum; Fabaceae). NM Forestry and Resources Conservation Division.. 20 p.
U.S. Fish and Wildlife Service (USFWS). 1985. Final rule to determine Astragalus humillimus to be endangered. Federal Register 50(124): 26568-26572.
Tonne, P. and M. Howard. 2009. A GIS of field observations for Chihuahua scurf pea (Pediomelum pentaphyllum) in Arizona and New Mexico. Natural Heritage New Mexico, University of New Mexico, Albuquerque, NM.
Barneby, R.C. 1983. Dragma Hippomanicum IX. A new Astragalus (Leguminosae: Astragalanae) from sandstone rim-rock in New Mexico. Brittonia 35(2): 109-110.