Willows are a diverse group of about 300 species of woody angiosperm plants in the genus Salix, family Salicaceae. Willows are widely dispersed and occur on all continents except Antarctica, but they are most diverse in cooler regions of the Northern Hemisphere.
All willows are woody plants, but the species vary greatly in size. Some species of willows are trees that can grow taller than 49 ft (15 m), while others are dwarf shrubs of the tundra that never get any taller than a few centimeters.
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