References
For Zanthoxylum
Appelhans, M.S., N. Reichelta, M. Groppoc, C. Paetzolda, and J. Wen. 2018. Phylogeny and biogeography of the pantropical genus Zanthoxylum and its closest relatives in the proto-Rutaceae group (Rutaceae). Molec. Phyl. Evol. 126: 31-44. Google Scholar
Kubitzki, K., ed. 2011. The families and genera of vascular plants. X. Flowering plants – Eudicots – Sapindales, Cucurbitales, Myrtaceae. Springer, Berlin. 436 pp. Google Scholar
Porter, D.M. 1976. Zanthoxylum (Rutaceae) in North America north of Mexico. Brittonia 28: 443-447. Google Scholar
Reynel, C. 2017. Zanthoxylum (Rutaceae). Flora Neotropica Monograph 117. NY Botanical Garden Press, Bronx, NY, USA. Google Scholar
Skean, J.D., Jr. 2024. Zanthoxylum. In Flora of North America Editorial Committee. 2024. Flora of North America north of Mexico. Volume 13, Magnoliophyta: Geraniaceae to Apiaceae. Oxford Univ. Press, New York, NY. 566 pp. Google Scholar