For Bartonia
Cameron, D.D., and J.F. Bolin. 2010. Isotopic evidence of partial mycoheterotrophy in the Gentianaceae: Bartonia virginica and Obolaria virginica as case studies. Amer. J. Bot. 97: 1272-1277.
Correll, D.S. 1966. Two new plants in Texas. Wrightia 3: 188-191.
Drake, J. 2011. Gentians of the eastern United States. Breath O' Spring Press, Suwanee, GA. 219 pp.
Gillett, J.M. 1959. A revision of Bartonia and Obolaria (Gentianaceae). Rhodora 61: 43-63.
Mathews, K.G., N. Dunne, E. York, and L. Struwe. 2009. A phylogenetic analysis and taxonomic revision of Bartonia (Gentianaceae: Gentianeae), based on molecular and morphological evidence. Systematic Bot. 34: 162-172.
Pringle, J.S. 2023. Gentianaceae. Pp. 3-92 In Flora of North America Editorial Committee. 2023c. Flora of North America north of Mexico. Volume 14, Magnoliophyta: Gentianaceae to Hydroleaceae. Oxford Univ. Press, New York, NY. 505 pp.
Struwe, L., and J.S. Pringle. 2018. Gentianaceae. In Kadereit, J., & V. Bittrich. 2018. The families and genera of flowering plants. XV. Flowering plants. Eudicots. Apiales, Gentianales (except Rubiaceae). Springer, Cham.
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