Planera aquatica
Encyclopedia
Planera aquatica, or Water Elm is single species in the southeastern U.S.A.
, a small deciduous
tree
10-15 m tall, closely related to the Elm
s 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.
It is moderately susceptible to Dutch Elm disease
.
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
, a small deciduous
Deciduous
Deciduous means "falling off at maturity" or "tending to fall off", and is typically used in reference to trees or shrubs that lose their leaves seasonally, and to the shedding of other plant structures such as petals after flowering or fruit when ripe...
tree
Tree
A tree is a perennial woody plant. It is most often defined as a woody plant that has many secondary branches supported clear of the ground on a single main stem or trunk with clear apical dominance. A minimum height specification at maturity is cited by some authors, varying from 3 m to...
10-15 m tall, closely related to the Elm
Elm
Elms are deciduous and semi-deciduous trees comprising the genus Ulmus in the plant family Ulmaceae. The dozens of species are found in temperate and tropical-montane regions of North America and Eurasia, ranging southward into Indonesia. Elms are components of many kinds of natural forests...
s but with a softly, prickly nut
Nut (fruit)
A nut is a hard-shelled fruit of some plants having an indehiscent seed. While a wide variety of dried seeds and fruits are called nuts in English, only a certain number of them are considered by biologists to be true nuts...
10-15 mm diameter, instead of a winged seed. It grows, as the name suggests, on wet sites. The leaves
Leaf
A leaf is an organ of a vascular plant, as defined in botanical terms, and in particular in plant morphology. Foliage is a mass noun that refers to leaves as a feature of plants....
are 3-7 cm long, with a serrated margin.
It is moderately susceptible to Dutch Elm disease
Dutch elm disease
Dutch elm disease is a disease caused by a member of the sac fungi category, affecting elm trees which is spread by the elm bark beetle. Although believed to be originally native to Asia, the disease has been accidentally introduced into America and Europe, where it has devastated native...
.