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References

Rabeler, R.K., C.C. Freeman, and W.J. Elisens. 2019c. Scrophulariaceae. 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.