UrticaceaeNettle family

  - Leaves simple, alternate, rarely opposite, mostly serrate, with 3-veined base.
  - With stipules.
  - Bark with some mucilage, but not very stringy.
  - Only simple hairs.
  - Petiole not swollen at tip.
  - Flowers reduced, without petals, not showy, unisexual.
  - Fruit a dry with a single seed or small fleshy berries with one seed.

Diagnosis: Trees, shrubs and climbers, bark with mucilage but not very stringy, with large free stipules, leaves simple, alternate (rarely opposite in woody species), serrate, often weakly 3-veined with lobed base, petioles mostly long without apical pulvinus, some with urticating simple hairs, lacking stellate hairs.

Similar families
Bombacaceae(Ochroma): stipules stalked, stringy bark, leaves often lobed.
Malvaceae: petiole swollen at tip, stringy bark, stellate hairs.
Moraceae: white latex.
Tiliaceae: petioles swollen at tip, often with lateral lobes, most have stellate hairs, stringy bark.

Diversity: Total: 6 genera, 30 species. Trees: 3 genera, 7 species.

Credits: Images and text copyright 2000-2007, William A. Haber, http://efg.cs.umb.edu/