J. F. Gmel.
|Natural range of the Water Elm|
Planera aquatica, or Water Elm, is a single species in the southeastern United States, a small deciduous tree 10–15 m tall, closely related to the Elms but with a softly, prickly nut 10–15 mm diameter, instead of a winged seed. It grows, as the name suggests, on wet sites. The leaves are 3–7 cm long, with a serrated margin. Despite its common English name, this species is not a true elm, although it is a close relative of the elms (species of the genus Ulmus). It is also subject to Dutch Elm Disease, a disease which affects only members of the Ulmaceae. It is native to most of the southeast United States. It is hardy down to Zone 7.
- "Water Elm Ulmaceae Planera aquatica J.F. Gmel.". Virginia Tech Department of Forestry and Environmental Conservation. Retrieved December 15, 2014.
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