For Glossostigma
Barker, W.R., G.L. Nesom, P.M. Beardsley, and N.S. Fraga. 2012. A taxonomic conspectus of Phrymaceae: A narrowed circumscription for Mimulus, new and resurrected genera, and new names and combinations. Phytoneuron 2012-39: 1–60.
Les, D.H., and R.S. Capers. 2019. Glossostigma. 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.
Les, D.H., R.S. Capers, and N.P. Tippery. 2006. Introduction of Glossostigma (Phrymaceae) to North America: a taxonomic and ecological overview. Amer. J. Bot. 93: 927-939.
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