References
For Ruellia
Daniel, T.F. 2013. Taxonomic, distributional, and nomenclatural notes on North American Acanthaceae. Mem. N.Y. Bot. Garden 108: 85-114. Google Scholar
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. Google Scholar
Fernald, M.L. 1945. Ruellia in eastern North America. Rhodora 47: 1-90 (pagination interrupted). Google Scholar
Long, R.W. 1970. The genera of Acanthaceae in the southeastern United States. J. Arnold Arb. 51: 257-309. Google Scholar
Manzitto-Tripp, E.A., and T.F. Daniel. 2023. Phylogeny and revised classification of New World Ruellia. Taxon. Google Scholar
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. Google Scholar
Turner, B.L. 1991. Texas species of Ruellia (Acanthaceae). Phytologia 71: 281-299. Google Scholar
Ward, D.B. 2007c. Keys to the flora of Florida – 17, Ruellia (Acanthaceae). Phytologia 89: 293-299. Google Scholar
Wasshausen, D.C. 1998. Acanthaceae of the southeastern United States. Castanea 63: 99-116. Google Scholar