For Phellodendron
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.
Kubitzki, K., ed. 2011. The families and genera of vascular plants. X. Flowering plants – Eudicots – Sapindales, Cucurbitales, Myrtaceae. Springer, Berlin. 436 pp.
Ma, J., W. Cao, Q. Liu, M. Yu, and L. Han. 2006. A revision of Phellodendron (Rutaceae). Edinburgh J. of Bot. 63: 131-151.
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