Dioecious trees or shrubs.
Stipules present, usually deciduous. Leaves alternate, simple.
Flowers in unisexual catkins, individual flowers subtended by a
bract. Perianth 0. Male flowers: stamens 2-many. Female flowers: ovary
superior, 1-locular; styles 1 or 2, stigmas 2, often 2-fid. Fruit a
capsule, dehiscing longitudinally into 2-4 valves. Seeds with
a tuft of long silky hairs. Worldwide: 2 genera and 435 species, cosmopolitan. |
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