]> Botany [collector note: Chihuahua; ARIZ, ENCB, GH, HSC, MEXU, MICH, MO, NMC, NY, RSA, TAES, UC, US, WIS] Peterson, Paul M. & Annable, C. R. Peterson, Paul M. & Annable, C. R. P. M. Peterson & C. R. Annable