References
For Harperocallis
Campbell, L.M. 2010. Four new species of Isidrogalvia (Tofieldiaceae) from the Guayana Highlands. Harvard Papers in Botany 15: 51-62. Google Scholar
Campbell, L.M., and L.J. Dorr. 2013. A synopsis of Harperocallis (Tofieldiaceae, Alismatales) with ten new combinations. PhytoKeys 21: 37-52. Google Scholar
McDaniel, S. 1968. Harperocallis, a new genus of the Liliaceae from Florida. J. Arnold Arb. 49: 35-40. Google Scholar
Remizowa, M.V., D.D. Sokoloff, L.M. Campbell, D.W. Stevenson, and P.J. Rudall. 2011. Harperocallis is congeneric with Isidrogalvia (Tofieldiaceae, Alismatales): evidence from comparative floral morphology. Taxon 60: 1076-1094. Google Scholar
Utech, F.H., and L.C. Anderson. 2002. Harperocallis. 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. Google Scholar
Zomlefer, W.B. 1997c. The genera of Tofieldiaceae in the southeastern United States. Harvard Papers in Botany 2: 179-194. Google Scholar