For Zigadenus
Schwartz, F.C. 2002. Zigadenus. In Flora of North America Editorial Committee. 2002a. Flora of North America north of Mexico. Volume 26, Magnoliophyta: Liliidae: Liliales and Orchidales. Oxford Univ. Press, New York, NY. 723 pp.
Tamura. 1998. In Kubitzki, K., ed. 1998a. The families and genera of vascular plants. III. Flowering plants – Monocotyledons – Lilianae (except Orchidaceae). Springer, Berlin. 478 pp.
Zomlefer, W.B. 1997a. The genera of Melanthiaceae in the southeastern United States. Harvard Papers in Botany 2: 133-177.
Zomlefer, W.B., M. McKain, and J. Rentsch. 2014. Documentation of the chromosome number for Zigadenus glaberrimus (Liliales: Melanthiaceae) and its significance in the taxonomy of tribe Melanthieae. Syst. Bot. 39: 411-414.
Zomlefer, W.B., N.H. Williams, W.M. Whitten, and W.S. Judd. 2001. Generic circumscription and relationships in the tribe Melanthieae (Liliales, Melanthiaceae), with emphasis on Zigadenus: evidence from ITS and trnL-F sequence data. Amer. J. Bot. 88: 1657-1669.
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