Ulmaceae
- Botanical description of this family of trees and shrubs with technical drawings of several species.
- http://delta-intkey.com/angio/www/ulmaceae.htm

Ulmaceae - The Elm Family
- Brief illustrated description of this family of woody plants, mostly trees, found primarily in northern, temperate regions.
- http://www.csdl.tamu.edu/FLORA/Wilson/tfp/ham/ulmpage2.htm