Ulmus n. : A genus of trees including the elm.

Example:


Taxonomy
Elm, tree, Dutch elm disease, species, cultivars, Europe, North America, disease, English Elms, elm tree, resistant, resistance, hybrid, clones, wood, USA, Asiatic species, resistant cultivars.

Defination from the web:
... deciduous and semi-deciduous trees comprising the genus Ulmus, family Ulmaceae. Elms first appeared in the Miocene ... In England, it was the English Elm Ulmus procera which came to dominate the landscape. ... Updated checklist of elm (Ulmus) cultivars for use in North America. ...