Which tree has white bark? Sort it by peel, leaf and region

White bark that peels: paper birch

If the bark comes away in thin, papery, horizontal sheets, start with paper birch. The Virginia Tech fact sheet describes young stems as reddish brown with pale lenticels, turning chalky to creamy white and peeling in horizontal strips, with orange inner bark and a darker, sometimes furrowed base. The tree reaches about 70 feet (21 m), often with several trunks. NC State Extension's paper birch profile adds that mature trees develop black markings on the white bark and that leaves turn yellow to golden yellow in fall.

Paper birch is a northern tree. NC State notes that it is stressed by summer heat and humidity and is not recommended for planting south of USDA zone 7, so a white, peeling birch in Georgia or Texas is more likely a planted cultivar or a river birch, whose peel is salmon to cream rather than white. In Canada the same tree is usually called white birch. For peeling barks of other colors, see trees with peeling bark.

White bark that barely peels: gray, European and Himalayan birches

Three birches are white but hold their bark tighter. Gray birch stays gray to chalky white and generally doesn't peel; its Virginia Tech sheet describes a small tree, rarely over 30 feet (9 m), with triangular leaves ending in a long, drawn-out tip. European white birch, a planted birch from Europe, has white bark that peels only a little and a base that turns thick, black and furrowed (Virginia Tech); its fine branches droop.

Himalayan birch cultivars are planted in yards and parks for their white trunks. The Royal Botanic Garden Edinburgh describes the white-barked variety jacquemontii as restricted in the wild to the Western Himalaya. The birch page separates all the birches by bark, leaf and twig smell.

White bark that stays smooth: aspen, white poplar and beech

Quaking aspen bark is smooth and creamy yellowish white to very light green, later furrowing and darkening near the base (Virginia Tech). The leaf stalk is flattened, which is why the leaves tremble in the slightest wind: if you searched "tree with white bark and leaves that tremble", this is it. Aspen is a small tree, 30 to 40 feet (9–12 m), often in thickets, and it is the white-barked tree of Colorado, Utah and the Rockies.

White poplar is the answer to "white bark and silver leaves". Virginia Tech's European white poplar sheet gives coarsely toothed, sometimes lobed, maple-like leaves 2 to 4 inches long, and bark that stays smooth and milky greenish white for several years before lenticels enlarge into dark splits and ridges. It coppices readily and often forms thickets. Vermont Invasives describes the leaf underside as bright white and hairy, notes that the tree is native to Europe, and lists it as a watch-list species in Vermont. The poplar page compares it with aspens and cottonwoods.

American beech is often called white but is really smooth gray. The Virginia Tech fact sheet describes its bark as smooth, thin and gray even on the largest trunks, and it never peels. Straight, parallel leaf veins, each ending in a tooth, confirm it; the beech page has the rest.

White on the upper branches: American sycamore

A big tree whose lower trunk is a patchwork of brown, green and tan but whose upper limbs glow white is an American sycamore. NC State's sycamore profile explains why: the light gray outer bark flakes off to expose inner bark that is white to cream-colored. The USDA Forest Service's Silvics of North America cites its distinctive white, exfoliating bark as the reason it is widely planted as a shade tree. Leaves are 4 to 9 inches (10–23 cm) wide with 3 to 5 lobes, and round seed balls hang on long stalks into winter. Sycamores reach 75 to 100 feet (23–30 m) and are common along streams in the East and Midwest. In Britain "sycamore" means a maple; the sycamore page explains both.

Warm climates: eucalypts with white trunks

In California, Florida and other frost-light areas, a tall, smooth trunk that is white in places and patched gray or pink in others may be a planted eucalypt. The Australian National Botanic Gardens describes the annual summer bark shedding of smooth-barked gums: brittle gum turns intense pink before peeling, then shows a creamy color that soon becomes the classic white trunk, while blue gum trunks show cinnamon patches. Crush a leaf: eucalyptus leaves are aromatic. Naming the species of a eucalypt takes its flower buds and fruit capsules, not the bark alone.

White bark and red, yellow or silver leaves

Most white-barked trees turn yellow in fall: NC State gives yellow to golden yellow for paper birch. So a pale trunk under red leaves usually is not a birch. The usual answer is a young red maple: NC State's red maple profile describes young bark as smooth and light gray, and leaves turning red in early fall. Look for opposite leaves with three main lobes. Silver leaves with white bark point to white poplar, and trembling leaves on flat stalks to aspen.

In the UK and Canada

In Britain, white bark almost always means silver birch or downy birch. The Woodland Trust describes silver birch bark that sheds layers like tissue paper, turns black and rugged at the base and develops dark diamond-shaped fissures; silver birch shoots are hairless and warty, downy birch shoots soft and hairy. White poplar and planted Himalayan birch are the other candidates. In Canada, the common white-barked trees are paper (white) birch and trembling aspen; the Canada guide places them by region.

Using a photo

Bark photos are harder for any app than leaf photos, but birches are among the easier barks. Photograph the trunk at chest height in even light, then a leaf if you can reach one. Tree Identifier names a tree from one photo, and paper birch, European white birch, American sycamore, American beech and Tasmanian blue gum are in its Collection. It shows no confidence score or alternatives, so check the answer against the peel test and the leaf. The follow-up chat under a result can tell you how that species' bark changes with age. The bark identification guide covers the other bark types.