References

For Trichostema

Harley et al. 2004. In Kadereit, J.W. 2004. The families and genera of vascular plants. VII. Flowering plants – Dicotyledons – Lamiales (except Acanthaceae including Avicenniaceae). Springer, Berlin. 478 pp. Google Scholar

Lewis, H. 1945. A revision of the genus Trichostema. Brittonia 5: 276-303. Google Scholar

McClelland, R.K.S., A.S. Weakley, and D.B. Poindexter. 2023. Seven new species of Trichostema (Lamiaceae: Ajugoideae) from the North American Coastal Plain biodiversity hotspot. Phytotaxa 603(2): 95-149. Google Scholar

McClelland, R.K.S., and A.S. Weakley. 2019. A new species of Trichostema (Lamiaceae, Ajugoideae) from barrier island systems of North and South Carolina. In Weakley, A.S., R.K.S. McClelland, R.J. LeBlond, K.A. Bradley, J.F. Matthews, C. Anderson, A.R. Franck, and J. Lange. 2019a. Studies in the vascular flora of the southeastern United States. V. J. Bot. Res. Inst. Texas 13(1): 107-129. Google Scholar

McClelland, R.K.S., and A.S. Weakley. 2023. Trichostema coeruleum, a new name for the widespread and common species currently or recently known as Trichostema brachiatum or Isanthus brachiatus, and its placement in a new section Isanthus. In Weakley, A.S., J.C. Kees, B.A. Sorrie, S.G. Ward, D.B. Poindexter, M. Brock, L.D. Estes, E.L. Bridges, S.L. Orzell, G.A. Levin, R.K.S. McClelland, R.J. Schmidt, and S.A. Namestnik. 2023. Studies in the vascular flora of the southeastern United States. IX. J. Bot. Res. Inst. Texas 17(1): 191-257. Google Scholar