Zigadenus fremontii (Torr.) Torr., Botany (Fortieth Parallel): 343. 1871 sec. Espejo-Serna & López-Ferrari 2008
- ≡Anticlea fremontii Torr. in Pacif. Railr. Rep. 4: 144. 1857 syn. sec. Espejo-Serna & López-Ferrari 2008
- =Zigadenus fremontii var. brevibracteatus M.E. Jones in Contr. W. Bot. 12: 78. 1908 syn. sec. Espejo-Serna & López-Ferrari 2008
- =Zigadenus brevibracteatus (M.E. Jones) H.M. Hall in Univ. Calif. Publ. Bot. 6: 165-166. 1915 syn. sec. Espejo-Serna & López-Ferrari 2008
- =Toxicoscordion brevibracteatus (M.E. Jones) R.R. Gates in J. Linn. Soc., Bot. 44: 158. 1918 syn. sec. Espejo-Serna & López-Ferrari 2008