References

For Ulmus

Kurz, H., and R.K. Godfrey. 1962. Trees of northern Florida. University Press of Florida, Gainesville, FL. 311 pp. Google Scholar

Sherman-Broyles, S.L. 1997. Ulmus. In Flora of North America Editorial Committee. 1997. Flora of North America north of Mexico. Volume 3, Magnoliophyta: Magnoliidae and Hamamelidae. Oxford Univ. Press, New York, NY. 590 pp. Google Scholar

Todzia, C.A. 1993. Ulmaceae. Pp. 603-611 In Kubitzki, K., J.G. Rohwer, and V. Bittrich, eds. 1993. The families and genera of vascular plants. II. Flowering plants – Dicotyledons – Magnoliid, Hamamelid and Caryophyllid families. Springer, Berlin. 653 pp. Google Scholar

Whittemore, A.T., and R.T. Olsen. 2011. Ulmus americana (Ulmaceae) is a polyploidy complex. Amer. J. Bot. 98: 754-760. Google Scholar

Whittemore, A.T., R.S. Fuller, B.H. Brown, M. Hahn, L. Gog, J.A. Weber, and A.L. Hipp. 2021. Phylogeny, Biogeography, and classification of the elms (Ulmus). Syst. Bot. 46: 711-727. Google Scholar

Wiegrefe, S.J., K.J. Sytsma, and R.P. Guries. 1994. Phylogeny of elms (Ulmus, Ulmaceae): molecular evidence for a sectional classification. Syst. Bot. 19: 590-612. Google Scholar