PolygonaceaeBuckwheat family

  - Leaves simple, alternate, entire, distichous.
  - Stipule forms a sheath (ochrea) around twig above node.
  - Flowers small, unisexual (plants usually dioecious).
  - Fruit fleshy and 1-seeded or dry with three wings.

Diagnosis: Trees and climbers, a single deciduous stipule (ochrea) sheaths node and twig above node, leaves simple, alternate, often distichous, entire, one species with hollow twigs harboring stinging ants.

Similar families
Piperaceae: spicy or aromatic odor, nodes swollen, stipule not tightly enclosing twig above node.

Diversity: Total: 4 genera, 8 species. Trees: 2 genera, 5 species.

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