Plants are monoecious (by-sexual).
Flowers small, not showy, imperfect (unisexual), in clusters or catkins.
All flowers with 4-5 sepals and no petals. Male flowers with 4-5 staments. Female flowers ovary superior and with one pistil.
Most species have stinging hairs.
Boehmeria (Sillk Plant) is a member of this family and has the longest fibers in the Plant Kingdom.
Central Yukon:(CYSIP study area)