Coefficient of Conservatism:
Coefficient of Wetness:
SLIPPERY ELM, RED ELM
A. A. Reznicek
Floodplains, stream banks, and rich hardwoods.
The samaras are often larger (11–18 mm long) than in U. americana, and not ciliate and scarcely if at all notched at the apex. The rusty or red-brown pubescence of the buds and roughness on the undersides of the leaves are the most helpful characters for separating vegetative specimens of U. rubra from scabrous-leaved ones of U. americana. The leaves of rapidly growing, indeterminate shoots are conspicuously large, scabrous-roughened, and folded, making saplings stand out.
The inner bark is quite mucilaginous, especially when chewed, whence the common name Slippery Elm, and is still used for throat lozenges, and other herbal uses.
See also notes under Ulmus pumila for hybrids.