References

For Bellardia

Uribe-Convers, S., and D.C. Tank. 2016. Phylogenetic revision of the genus Bartsia (Orobanchaceae): disjunct distributions correlate to independent lineages. Syst. Bot. 41: 672-684. Google Scholar

Zacharias, E.H. 2019. Bellardia. 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