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For Pombalia

Ballard, H.E., Jr. (in prep.). Violaceae of the Southeastern United States.

Ballard, H.E., Jr., R.N. Burwell, and S.L. Lockhart. 2020. Violaceae: Typifications and clarifications of names. In Weakley, A.S., D.B. Poindexter, H.C. Medford, B.A. Sorrie, C.A. McCormick, E.L. Bridges, S.L. Orzell, K.A. Bradley, H.E. Ballard, Jr., R.N. Burwell, S.L. Lockhart, and A.R. Franck. 2020. Studies in the vascular flora of the southeastern United States. VI. J. Bot. Res. Inst. Texas 14: 199-240.

Ballard, Paula-Souza, & Wahlert In Kubitzki, K., ed. 2014. The families and genera of vascular plants, XI. Flowering plants – Eudicots – Malpighiales. Springer, Berlin. 331 pp.

Little, R.J. 2015. Hybanthus. In Flora of North America Editorial Committee. 2015. Flora of North America north of Mexico. Volume 6, Magnoliophyta: Cucurbitaceae to Droseraceae. Oxford Univ. Press, New York, NY. 468 pp.

Paula-Souza, J. de., and H.E. Ballard, Jr. 2014. Re-establishment of the name Pombalia, and new combinations from the polyphyletic Hybanthus (Violaceae). Phytotaxa 183: 1-15.

Wahlert, G.A., T. Marcussen, J. de Paula-Souza, M. Feng, and H.E. Ballard, Jr. 2014. A phylogeny of the Violaceae (Malpighiales) inferred from plastid DNA sequences: implications for generic diversity and intrafamilial classification. Syst. Bot. 39: 239-252.

Wofford, B.E., J. de Paula-Souza, A.S. Weakley, and T.E. Govus. 2004. The rediscovery of the South American Hybanthus parviflorus (Violaceae) in North America. Sida 21: 1209-1214.

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