Cedar elm (Ulmus cassifolia) grows rapidly to medium or large size in the Southern United States and northeastern Mexico, where it may sometimes be called basket elm, red elm, southern rock elm, or olmo (Spanish) It usually is found on moist, limestone soils along water courses with other bottomland trees, but it also paws on dry limestone hills. The wood 15 very strong, the lunber is mixed with other southern elm species and sold as rock elm. Its seed are eaten by several species of birds. Within its range, cedar elm is often planted as an ornamental shade tree. It has the smallest leaves of any native lem and is one of two that flower in the fall.
Stransky, John J.; Bierschenk, Sylvia M. 1990. Ulmus crassifolia Nutt. Cedar Elm. In: Silvics of North America. Hardwoods. Agric. Handb. 654. Washington, DC: U.S. Department of Agriculture : 808-811. Vol . 2.