References

For Paulowniaceae

Freeman, C.C., R.K. Rabeler, and W.J. Elisens. 2019b. Paulowniaceae. 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. Google Scholar

Manning, S.D. 2000. The genera of Bignoniaceae in the southeastern United States. Harvard Papers in Botany 5: 1-77. Google Scholar

Spangler, R.E., and R.G. Olmstead. 1999. Phylogenetic analysis of Bignoniaceae based on the cpDNA gene sequences rbcL and ndhF. Ann. Missouri Bot. Gard. 86: 33-46. Google Scholar