For Ruellia
Daniel, T.F. 2013. Taxonomic, distributional, and nomenclatural notes on North American Acanthaceae. Mem. N.Y. Bot. Garden 108: 85-114.
Ezcurra, C., and T.F. Daniel. 2007. Ruellia simplex, an older and overlooked name for Ruellia tweediana and Ruellia coerulea (Acanthaceae). Darwiniana 45: 201-203.
Fernald, M.L. 1945. Ruellia in eastern North America. Rhodora 47: 1-90 (pagination interrupted).
Long, R.W. 1970. The genera of Acanthaceae in the southeastern United States. J. Arnold Arb. 51: 257-309.
Manzitto-Tripp, E.A., and T.F. Daniel. 2023. Phylogeny and revised classification of New World Ruellia. Taxon.
Tripp, E.A., T.F. Daniel, J.C. Lendemer, and L.A. McDade. 2009. New molecular and morphological insights prompt transfer of Blechum to Ruellia (Acanthaceae). Taxon 58: 893-906.
Turner, B.L. 1991. Texas species of Ruellia (Acanthaceae). Phytologia 71: 281-299.
Ward, D.B. 2007c. Keys to the flora of Florida – 17, Ruellia (Acanthaceae). Phytologia 89: 293-299.
Wasshausen, D.C. 1998. Acanthaceae of the southeastern United States. Castanea 63: 99-116.
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