1. R. P. Adams, J. A. Bartel, R. A. Price, "Phytologia." 91, "A new genus, Hesperocyparis, for the cypresses of the Western Hemisphere (Cupressaceae)." 160 (2009)
2. M. J. Botha, "iNaturalist observation." (2018)
3. M. J. Botha, "iNaturalist observation." (2021)
4. K. C. Doering, "University of Kansas Science Bulletin." 18, "The genus Clastoptera in America north of Mexico." 5 (1928)
5. D. T. Fischer, S. V. Smith, R. R. Churchill, "Journal of Hydrology." 186, "Simulation of a century of runoff across the Tomales watershed, Marin County, California." 253 (1996)