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River birch

Photo: Dean S, CC BY 4.0, via iNaturalist · Stevens Point, WI, USA, 2025-07-04

Trees · Native to the eastern United States, not Quebec

River birch

Betula nigra Betulaceae

River birch is a fast-growing deciduous tree, often grown with several trunks, whose bark peels in papery curls of salmon, cinnamon and cream. Its diamond-shaped, toothed leaves are glossy green in summer and turn yellow in fall. Hanging catkins appear in spring as the leaves open, and the small winged seeds ripen and drop by early summer, unusually early for a birch. In winter the peeling bark is the main show.

Latin
Betula nigra
L. · family Betulaceae
English
French
Bouleau noir
Bouleau de rivière
Source: Arboquebecium: Bouleau noir (arbres introduits)
Kanien'kéha (Mohawk)
Name not yet recorded
River birch does not grow wild in Quebec or Kanien'kéha territory. No species-specific Kanien'kéha name was found; the Greenbelt Indigenous Botanical Survey covers paper, black (cherry), and yellow birch but not river birch.
Source: Greenbelt Indigenous Botanical Survey: Paper birch, black birch, yellow birch and speckled alder
Anishinaabemowin (Ojibwe)
Name not yet recorded
The Ojibwe People's Dictionary lists birch words (wiigwaas, wiigwaasaatig for paper birch; wiinizik for yellow birch) but none for river birch, which is outside Anishinaabe territory in the north. Huron Smith's 1932 Ojibwe ethnobotany does not include it.
Source: Ojibwe People's Dictionary: search 'birch' · Huron H. Smith, Ethnobotany of the Ojibwe Indians (1932), Project Gutenberg

Through the year

River birch in every season.

Story

The history of river birch.

River birch grows wild along streambanks, floodplains and swamps of the eastern United States, from New Hampshire west to southern Minnesota and south to northern Florida and Texas. It tolerates flooding better than other birches and is the most heat-tolerant member of the genus. Unlike other birches, it ripens its seed in late spring or early summer. It is listed as threatened at its northern edge in New Hampshire.

Linnaeus named the species Betula nigra; the epithet nigra (black) likely refers to its darker bark compared with other birches. Indigenous peoples boiled the sap into a sweetener in the same way as maple sap. The tree became widely planted as an ornamental after the selection of the 'Heritage' form in St. Louis, which was patented in 1979 and combines pale bark with resistance to the bronze birch borer that kills many other birches in gardens.

Sources: Wikipedia: Betula nigra · Missouri Botanical Garden Plant Finder: Betula nigra 'Cully' HERITAGE

'Heritage' ('Cully')

Selected for cream to salmon peeling bark that reveals a pale, almost white inner bark, and for strong resistance to bronze birch borer and leaf spot. It was found growing in St. Louis, Missouri by Earl Cully and received U.S. Plant Patent 4,409 in 1979.

Where it comes from

How it got to Canada.

Native rangeEastern United States, from New Hampshire and southern Minnesota south to northern Florida and Texas.

River birch reached Quebec as a nursery-grown ornamental, and Quebec tree references list it among introduced trees. It is valued here for its peeling bark, its tolerance of wet clay, and the bronze birch borer resistance of the 'Heritage' selection. It is not recorded as growing wild in Canada, and it is not listed as invasive in Quebec.

Sources: Arboquebecium: Bouleau noir (arbres introduits) · Wikipedia: Betula nigra

Characteristics

The plant at a glance.

Height12 to 20 m in gardens, taller in the wild
Spread10 to 15 m
HabitPyramidal when young, rounded with age; often multi-trunked
Bloom timeApril to May
FlowersBrownish male and greenish female catkins
FoliageDiamond-shaped, toothed leaves; yellow in fall
FruitSmall cone-like catkins of winged nutlets, ripening in late spring to early summer
HardinessZone 4
LightFull sun to part shade
MoistureMoist to wet; tolerates clay and poor drainage
Spread behaviourSingle tree, often multi-stemmed
Native rangeEastern United States
Quebec statusNot native, cultivated

In the Flight Path Garden

Where it grows here.

ZonesMini-Forest
How many2
Planted2026 (one replaced a maple that died)

In the Mini-Forest it fills a canopy gap left by a maple that died, using its tolerance of wet, heavy soil to grow quickly and shade the understory planting.

Wildlife

Who uses it.

  • Seeds ripen in early summer and are eaten by seed-eating birds such as ruffed grouse and wild turkey, and by small mammals.
  • Hosts the caterpillars of more than fifteen moth species.
  • Deer browse saplings and twigs, so young trees benefit from protection.

Sources: Wikipedia: Betula nigra · Lady Bird Johnson Wildflower Center: Betula nigra

Care

What to do, season by season.

Spring

Avoid pruning in spring, when birches bleed sap heavily. Mulch the root zone to keep it cool and moist.

Summer

Water deeply in dry spells during the first few years; leaves may yellow and drop early under drought. Prune any crossing branches in midsummer.

Fall

Leave fallen leaves under the tree as mulch. Water well before freeze-up if the fall is dry.

Winter

Wrap or guard young trunks against deer and rodents. Brush heavy snow off multi-stem trees to prevent splitting.

Relations

Knowledge and use.

Indigenous peoples in the tree's native range boiled river birch sap into a sweetener, much as maple sap is used, and the inner bark served as an emergency food.

Source: Wikipedia: Betula nigra

Sources

Where this page comes from.

  1. Wikipedia: Betula nigra
  2. Missouri Botanical Garden Plant Finder: Betula nigra 'Cully' HERITAGE
  3. Lady Bird Johnson Wildflower Center: Betula nigra
  4. Arboquebecium: Bouleau noir
  5. Ojibwe People's Dictionary: search 'birch'
  6. Greenbelt Indigenous Botanical Survey: birches
  7. Huron H. Smith, Ethnobotany of the Ojibwe Indians (1932)