For Castilleja
Allison, J.R., and T.E. Stevens. 2001. The endemic flora of Ketona dolomite outcrops in Bibb County, Alabama. Castanea 66: 154-205.
Egger, M.J., P.F. Zika, B.L. Wilson, R.E. Brainerd, and N. Otting. 2019. Castilleja 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.
Nesom, G.L., and J.M. Egger. 2014. Castilleja coccinea and C. indivisa (Orobanchaceae). Phytoneuron 2014-14: 1-7.
Pennell, F.W. 1935. The Scrophulariaceae of eastern temperate North America. Academy of Natural Sciences of Philadelphia Monograph No. 1.
Singhurst, J.R., J.M. Egger, J.N. Mink, and W.C. Holmes. 2020. Castilleja halophila (Orobanchaceae): a new species from the Texas Coastal Bend. Phytologia 102(3): 208-218.
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