For Cupressaceae
Farjon, A. 2005. A monograph of Cupressaceae and Sciadopitys. Royal Botanic Gardens, Kew. 643 pp.
Hardin, J.W. 1971b. Studies of the southeastern United States flora. II. The gymnosperms. J. Elisha Mitchell Sci. Soc. 87:43-50.
Hart, J.A., and R.A. Price. 1990. The genera of Cupressaceae (including Taxodiaceae) in the southeastern United States. J. Arnold Arb. 71: 275-322.
Page. 1990. In Kramer, K.U., and P.S. Green. 1990. Pteridophytes and Gymnosperms. In K. Kubitzki, ed., The families and genera of vascular plants. Springer-Verlag, Berlin.
Schulz, C., P. Knopf, and T. Stützel. 2005. Identification key to the Cypress family (Cupressaceae). Feddes Rep. 116: 96-146.
Watson, F.D., and J.E. Eckenwalder. 1993. Cupressaceae. In Flora of North America Editorial Committee. 1993b. Flora of North America north of Mexico. Volume 2, pteridophytes and gymnosperms. Oxford Univ. Press, New York, NY. 475 pp.
Zhu, A., W. Fan, R. P. Adams, and J. P. Mower. 2018. Phylogenomic evidence for ancient recombination between plastid genomes of the Cupressus-Juniperus-Xanthocyparis complex (Cupressaceae). BMC Evolutionary Biology 18:137, doi.org/10.1186/s12862-018-1258-2.
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