Willow Tree Identification: Leaves, Buds and Bark

To identify a willow tree, look for long, narrow, finely toothed leaves, fuzzy catkins that open in early spring before or with the leaves, and buds that are each wrapped in one smooth cap-like scale. Add a damp site — a stream bank, pond edge or floodplain — and you almost certainly have a willow.

Check these four features in order:

• Leaves. Most willows have narrow, lance-shaped leaves, long relative to their width, with pointed tips and finely toothed edges (Tree Identifier). Goat willow is the common exception, with broader oval leaves whose tips curl down (Roots Plants).
• Buds. Willow buds are covered by a single scale (Wikipedia); NC State Extension describes black willow's as enclosed in a single cap-like scale. Because it does not depend on leaves, it is the most useful winter check.
• Catkins. Cylindrical, fuzzy flower clusters in early spring. Nearly all willows carry male and female catkins on different trees (Wikipedia).
• Bark and twigs. Young bark is smooth; mature bark is gray-brown and furrowed (Tree Identifier, Woodland Trust). Twigs are slender and flexible.

The genus Salix has around 350 species plus many hybrids according to Wikipedia; Tree Identifier and Roots Plants both give about 400.

A weeping willow (Salix babylonica) is identified by long, pendulous branches that hang down, light green narrow leaves 3 to 6 inches long and under 1 inch wide with a grayish-green underside, and reddish- to yellowish-brown twigs (NC State Extension). It grows 30 to 40 feet tall and as wide, with gray-brown to gray-black irregularly furrowed bark, and is hardy in zones 6a to 8b.

Despite its name it is native to China, not Babylon (NC State Extension). Heights vary by source: Roots Plants gives about 12 m for mature trees in the UK, and Tree Identifier gives 30 to 50 feet.

NC State Extension also warns that weeping willow roots can damage water and sewer pipes and that the wood is weak and breaks easily under snow or ice, which is worth knowing before planting one near a house.

'Willow' is the whole genus; 'weeping willow' is one species, Salix babylonica, whose branches hang down. Most willows grow upright or with arching branches instead. Tree Identifier's table puts white willow at 50 to 80 feet with silvery leaf undersides, black willow at 30 to 80 feet with near-black furrowed bark, and pussy willow as a 6 to 25 foot shrub or small tree.

So a willow that does not weep is still a willow; check the leaves, buds and catkins above. And a tree that weeps is not automatically a willow; see the look-alikes below.

• White willow (Salix alba): up to 25 m tall. Slender oval leaves look paler than most willows because of a felt of fine, silky, silvery-white hairs underneath. Male catkins 4 to 5 cm, female 3 to 4 cm. In winter, look for narrow, hairy, green to yellow-brown buds pressed close to the twig (Woodland Trust).
• Black willow (Salix nigra): native to eastern and central North America, from Maine to Minnesota south to Colorado, Texas and Florida. Usually 70 to 80 feet; leaves 3 to 6 inches, under 1 inch wide, finely toothed, medium to dark green and without whitish undersides; bark dark brown to black with deep grooves and shaggy scales; twigs brittle where new growth meets old; zones 4a to 9b (NC State Extension).
• Pussy willow (Salix discolor): a North American shrub 10 to 20 feet tall with 3 to 4 inch leaves that are gray-green underneath, known for silky gray male catkins that open in spring before the leaves; zones 2a to 7b (NC State Extension).
• Goat willow (Salix caprea): around 9 m, with fuzzy yellow-gray catkins before the leaves and broader oval leaves with down-curled tips (Roots Plants).

• Crack willow: 50 to 65 feet; twigs snap with an audible crack (Tree Identifier).
• Corkscrew willow (Salix matsudana 'Tortuosa'): twisted, contorted stems and bluish undersides to the leaves (Roots Plants).
• Osier (Salix viminalis): about 6 m, with very long thin leaves up to 20 cm long and only 1 cm wide, silvery and downy underneath (Roots Plants).
• Dappled or flamingo willow (Salix integra 'Hakuro-nishiki'): a small shrub whose new leaves open coral pink before turning cream-and-green (Roots Plants).

Willows hybridize freely (Woodland Trust), and Wikipedia counts over 160 named hybrids, so pinning a wild tree to a single species is often not possible. Getting to 'willow' is reliable; the species name may stay uncertain.

Tree Identifier lists these common look-alikes; the check that rules each one out is in bold:

• Weeping birch: small triangular leaves and papery bark.
• Weeping cherry: wide oval leaves and spring blossom.
• Willow oak: narrow willow-like leaves but smooth edges and acorns; it is an oak. See our oak tree identification guide.
• Cottonwoods and poplars: close relatives with broad triangular leaves.
• Desert willow: showy trumpet flowers; not a true willow.
• Russian olive: small thorns; willows have none.

In winter, when leaves are gone, the single-scale bud is the fastest way to confirm a real willow.

• Late winter to early spring: catkins appear on bare twigs, silky gray on pussy willow and yellow-gray on goat willow (NC State Extension; Roots Plants). Male and female catkins are on separate trees.
• Spring and summer: check leaf shape, the teeth on the edge and the color of the underside: silvery on white willow, gray-green on pussy and weeping willow, not whitish on black willow.
• Autumn: leaves drop; note the twig color, such as the reddish- to yellowish-brown twigs of weeping willow (NC State Extension).
• Winter: look at the buds. One cap-like scale per bud means willow; in white willow the narrow hairy buds lie pressed against the twig (Woodland Trust).

None of the top-ranking pages uses the single bud scale as a test, even though it works in every season the tree has buds. For more on reading bark and leaves, see tree bark identification and tree leaf identification.

NatureLens identifies trees from a photo, with free scans every day. For a willow, photograph a single leaf flat against your palm (top and underside), a twig tip with its buds in close-up, and the whole tree from a distance so the shape shows. The leaf underside and the bud are what separate the species, so include them. The white willow's bark was historically used for pain relief and aspirin derives from salicin found in willow bark (Woodland Trust), but do not use bark as a remedy based on an app ID.

Research and drafting for this page used AI assistance. Every measurement, date and claim was then checked against the sources listed below, which were opened and read on 2026-09-25. Where two sources give different numbers, both are shown with the source named.