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Water elm
NAS-130y Planera aquatica.png
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Rosales
Family: Ulmaceae
Genus: Planera
P. aquatica
Binomial name
Planera aquatica
Planera aquatica range map.jpg
Natural range of the water elm

Planera is a genus of flowering plants with a single species, Planera aquatica,[1] the planertree[2] or water elm. Found in the southeastern United States, it is 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.[3]


  1. ^ a b "Search results for Planera". The Plant List. Retrieved 1 March 2016.
  2. ^ "Planera aquatica". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 7 October 2015.
  3. ^ "Water Elm Ulmaceae Planera aquatica J.F. Gmel". Virginia Tech Department of Forestry and Environmental Conservation. Retrieved December 15, 2014.