For Epifagus
Collins, L.T., A.E.L. Colwell, and G. Yatskievych. 2019b. Epifagus. In Flora of North America Editorial Committee. 2019. Flora of North America north of Mexico. Volume 17, Magnoliophyta: Tetrachondraceae to Orobanchaceae. Oxford Univ. Press, New York, NY. 737 pp.
Thieret, J.W. 1971. The genera of Orobanchaceae in the southeastern United States. J. Arnold Arb. 52: 404-434.
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