For Hemerocallis
Straley, G.B., and F.H. Utech. 2002c. Hemereocallis. 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.
Zomlefer, W.B. 1998. The genera of Hemerocallidaceae in the southeastern United States. Harvard Papers in Botany 3: 113-145.
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