Willow

Willows, also called sallows and osiers, from the genus Salix, are around 400 species[2] of deciduous trees and shrubs, found primarily on moist soils in cold and temperate regions of the Northern Hemisphere.

Willow
Salix alba 'Vitellina-Tristis'
Morton Arboretum
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malpighiales
Family: Salicaceae
Subfamily: Salicoideae
Tribe: Saliceae
Genus: Salix
L., nom. cons.[1]
Type species
Salix alba L.
Species

About 400.[2]
See List of Salix species

Most species are known as willow, but some narrow-leaved shrub species are called osier, and some broader-leaved species are referred to as sallow (from Old English sealh, related to the Latin word salix, willow).

Some willows (particularly arctic and alpine species) are low-growing or creeping shrubs; for example, the dwarf willow (Salix herbacea) rarely exceeds 6 cm (2+12 in) in height, though it spreads widely across the ground.