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Native Plant Trust: Go Botany Discover thousands of New England plants

Juglans cinerea — butternut, white walnut

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Facts

White walnut is a relatively short-lived tree of rich soils and streambanks. Look for compound leaves with 11-19 leaflets and fruits with a brownish bloom that contains a dye that readily stains hands and fabric. The oily nuts are delicious for humans and wildlife, but do not store well. The wood is light, stable, and easily worked for carving and veneer, but is less prized than its close relative, black walnut.

Habitat

Anthropogenic (man-made or disturbed habitats), floodplain (river or stream floodplains), forests

New England distribution

Adapted from BONAP data

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North America distribution

Adapted from BONAP data

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Characteristics

Habitat
terrestrial
New England state
  • Connecticut
  • Maine
  • Massachusetts
  • New Hampshire
  • Rhode Island
  • Vermont
Growth form
the plant is a tree
Leaf type
the leaf blade is compound (i.e., made up of two or more discrete leaflets
Leaves per node
there is one leaf per node along the stem
Leaf blade edges
the edge of the leaf blade has teeth
Leaf duration
the leaves drop off in winter (or they wither but persist on the plant)
armature on plant
the plant does not have spines, prickles, or thorns
Leaf blade length
300–600 mm
Leaf stalk
the leaves have leaf stalks
Fruit type (general)
the fruit is dry but does not split open when ripe
Bark texture
the bark of an adult plant is ridged or plated
Twig winter color
  • gray
  • green
  • red
Bud scale number
there are two scales on the winter bud, and their edges meet
Show all characteristics

  • Buds or leaf scars

    Bud scale number
    there are two scales on the winter bud, and their edges meet
    Bud scar shape (Fraxinus)
    NA
    Collateral buds
    there are no collateral buds on the sides of the branches
    Leaf scar arrangement
    there is one leaf scar per node on the stem or twig
    Superposed buds
    • there are no superposed buds on the branch
    • there are superposed buds above the main (terminal) bud
    Terminal bud
    the branch has a terminal bud on it
    Winter bud scale hairs
    the winter bud scales are hairy
    Winter bud scales
    the winter bud is perulate (partially or completely covered with one or more scales)
    Winter bud shape
    the winter buds are a shape other than the choices given
    Winter bud stalks
    the winter buds have no stalks

  • Flowers

    Carpels fused
    the carpels are fused to one another
    Enlarged sterile flowers
    there are no enlarged sterile flowers on the plant
    Flower petal color
    NA
    Flower symmetry
    there are two or more ways to evenly divide the flower (the flower is radially symmetrical)
    Hairs on ovary (Amelanchier)
    NA
    Hypanthium present
    the flower does not have a hypanthium
    Inflorescence position
    • the inflorescences grow on older branches
    • the inflorescences grow on the twigs
    Inflorescence type
    • the inflorescence is a raceme (a long unbranched stem with stalked flowers growing along it)
    • the inflorescence is an ament (catkin; slender, usually pendulous inflorescence with crowded unisexual flowers)
    Number of pistils
    1
    Ovary position
    the ovary is below the point of petal and/or sepal attachment
    Petal and sepal arrangement
    the flower includes only one cycle of petals or sepals
    Petal appearance
    NA
    Petal fusion
    NA
    Sepal cilia (Ilex)
    NA
    Sepal tip glands
    there are no glands at the tips of the sepal lobes
    Stamen number
    • 10
    • 11
    • 12
    • 13 or more
    • 8
    • 9
    Stamen position relative to petals
    NA

  • Fruits or seeds

    Berry color
    NA
    Fruit tissue origin
    there are no flower parts that form part of the fruit
    Fruit type (general)
    the fruit is dry but does not split open when ripe
    Fruit type (specific)
    • the fruit is a drupe (fleshy, with a firm inner ovary wall that encloses a single seed)
    • the fruit is a nut (dry and indehiscent, with a hard wall, usually containing only one seed and usually subtended by an involucre)
    Nut with spines (Fagaceae)
    NA
    Wings on fruit
    there are no wings on the fruit

  • Glands or sap

    Sap color
    the sap is clear and watery
    Stalked glands on fruit (Rosa)
    NA

  • Growth form

    Growth form
    the plant is a tree

  • Leaves

    Hairs on underside of leaf blade
    the underside of the leaf has hairs on it
    Hairs on upper side of leaf blade
    the upper side of the leaf is fuzzy or hairy
    Leaf blade base shape
    • the base of the leaf blade is rounded
    • the base of the leaf blade is truncate (ends abruptly in a more or less straight line as though cut off)
    Leaf blade base symmetry
    • the leaf blade base is asymmetrical
    • the leaf blade base is symmetrical
    Leaf blade bloom
    the underside of the leaf has no noticeable bloom
    Leaf blade edges
    the edge of the leaf blade has teeth
    Leaf blade edges (Acer)
    NA
    Leaf blade flatness
    the leaf is flat (planar) at the edges
    Leaf blade hairs
    • at least some of the hairs on the leaf blade are branched
    • at least some of the hairs on the leaf blade have glands at their tips
    Leaf blade length
    300–600 mm
    Leaf blade scales
    • there are no scales on the leaf blades
    • there are scales on the leaf blades
    Leaf blade shape
    • the leaf blade is lanceolate (lance-shaped; widest below the middle and tapering at both ends)
    • the leaf blade is oblong (rectangular but with rounded ends)
    • the leaf blade is ovate (widest below the middle and broadly tapering at both ends)
    Leaf blade texture
    • the leaf blade is coriaceous (has a firm, leathery texture)
    • the leaf blade is herbaceous (has a leafy texture)
    Leaf blade translucent dots
    there are no translucent dots on the leaf blade
    Leaf blade vein pattern
    the main veins of the leaf blade are pinnate (the secondary veins branch off at intervals from the main central vein) and non-arcuate (not arched towards the leaf tip)
    Leaf blade veins
    the leaf blade has one main vein running from the base toward the tip
    Leaf duration
    the leaves drop off in winter (or they wither but persist on the plant)
    Leaf form
    the plant is broad-leaved (with broadly flattened leaf blades)
    Leaf lobe tips (Quercus)
    NA
    Leaf midrib glands
    the midrib of the leaf blade lacks glands on the upper surface
    Leaf stalk
    the leaves have leaf stalks
    Leaf stalk attachment to leaf
    the petiole attaches at the basal margin of the leaf blade
    Leaf stalk nectaries
    there are no nectaries on the leaf stalk
    Leaf stalk shape
    the leaf stalk is not flattened
    Leaf teeth
    the leaf blade margin is serrate (with forward-pointing) or dentate (with outward-pointing) with medium-sized to coarse teeth
    Leaf teeth hairs (Carya)
    NA
    Leaf type
    the leaf blade is compound (i.e., made up of two or more discrete leaflets
    Leaves per node
    there is one leaf per node along the stem
    Specific leaf type
    the leaf is compound, with a single terminal leaflet and more than two additional leaflets
    Stipules
    there are no stipules on the plant, or they fall off as the leaf expands

  • Place

    Habitat
    terrestrial
    New England state
    • Connecticut
    • Maine
    • Massachusetts
    • New Hampshire
    • Rhode Island
    • Vermont
    Specific habitat
    • forests
    • man-made or disturbed habitats
    • river or stream floodplains

  • Scent

    Plant odor
    • the plant does not have much of an odor, or it has an unpleasant or repellant odor
    • the plant has a pleasantly aromatic odor

  • Stem, shoot, branch

    Aerial roots
    the plant has no aerial roots
    Bark texture
    the bark of an adult plant is ridged or plated
    Branch brittleness (willows only)
    NA
    Branch cross-section
    the branch is circular in cross-section, or it has five or more sides, so that there are no sharp angles
    First-year cane (Rubus)
    NA
    Lenticels on twigs
    there are clearly lenticels on the twigs
    Pith type
    the pith inside the twig is chambered (there are hollow sections with walls between them)
    Short shoots
    there are no peg- or knob-like shoots present
    Twig bloom
    there is no bloom on the twig
    Twig hairs
    the twigs have hairs with glands at their tips
    Twig papillae (Vaccinium species only)
    NA
    Twig scales
    there are no scales on the twig surface
    Twig winter color
    • gray
    • green
    • red
    Wings on branch
    the branch does not have wings on it
    armature on plant
    the plant does not have spines, prickles, or thorns

Wetland status

Usually occurs in non-wetlands, but occasionally in wetlands. (Wetland indicator code: FACU)

In New England

Distribution

Connecticut
present
Maine
present
Massachusetts
present
New Hampshire
present
Rhode Island
present
Vermont
present

Conservation status

Exact status definitions can vary from state to state. For details, please check with your state.

Maine
unrankable (S-rank: SU)
Massachusetts
fairly widespread (uncertain) (S-rank: S4?)
New Hampshire
uncommon (S-rank: S3), W (code: W)
Vermont
uncommon (S-rank: S3)

From Flora Novae Angliae dichotomous key

2.  Juglans cinerea L. N

white walnut. Wallia cinerea (L.) Alef. • CT, MA, ME, NH, RI, VT. Rich, mesic forests, riparian forests, roadsides. This tree is sometimes cultivated and found along roadsides and near homes.

1×2. Juglans ailantifolia × Juglans cinerea → Juglans ×‌bixbyi Rehd. This infrequent walnut hybrid is known from ct, mA (and likely found in other states). It is most common in the planted setting along streets and in yards, but naturalized populations have been observed. The hybrid is intermediate between its two parental species. This is perhaps best evidenced in the exterior of the endocarp (i.e., the shell), which is ridged, but not as prominently as in J. cinerea.

Native to North America?

Yes

Sometimes confused with

Juglans ailantifolia:
branchlets with light brown pith, with thin diaphragms that are much narrower than the chambers they alternate with, upper margin of leaf scar with a conspicuous notch, and exterior of endocarp rugose (vs. J. cinerea, with branchlets with dark brown pith, with relatively thick diaphragms that are nearly as broad as the chambers they alternate with, upper margin of leaf scar straight or scarcely notched, and exterior of endocarp strongly 6- to 8-ridged and with irregular, +/- sharp crests and projections).
Juglans nigra:
pith of branchlets light brown and fruits solitary or paired and spherical or nearly so (vs. J. cinerea, with pith of branchlets dark brown and fruits 3-7 together and ellipsoid).

Synonyms

  • Wallia cinerea (L.) Alef.

Family

Juglandaceae

Genus

Juglans