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Populus tremula — European poplar

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Facts

European poplar has a very patchy distribution in the U. S., and in New England is only recorded from Hampshire County in Massachusetts. It resembles the native quaking aspen (P. tremuloides), with its silvery-white bark and diamond-shaped leaves. Look closely at the leaves, though, and you'll see that those of European poplar are much more coarsely toothed and sinuous, with a few of those teeth projecting out more that 1 mm from the leaf edge.

Habitat

Anthropogenic (man-made or disturbed habitats)

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
Massachusetts
Growth form
the plant is a tree
Leaf type
the leaf blade is simple (i.e., lobed or unlobed but not separated into 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
30–80 mm
Leaf stalk
the leaves have leaf stalks
Fruit type (general)
the fruit is dry and splits open when ripe
Bark texture
the bark of an adult plant is thin and smooth
Twig winter color
  • brown
  • gray
  • yellow
Bud scale number
there are three or more scales on the winter bud, and they overlap like shingles, with one edge covered and the other edge exposed
Show all characteristics

  • Buds or leaf scars

    Bud scale number
    there are three or more scales on the winter bud, and they overlap like shingles, with one edge covered and the other edge exposed
    Bud scar shape (Fraxinus)
    NA
    Collateral buds
    there are no collateral buds on the sides of the branches
    Superposed buds
    there are no superposed buds on the branch

  • Flowers

    Carpels fused
    the carpels are fused to one another
    Enlarged sterile flowers
    there are no enlarged sterile flowers on the plant
    Flower appearance
    the flowers appear before the leaves
    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 type
    the inflorescence is an ament (catkin; slender, usually pendulous inflorescence with crowded unisexual flowers)
    Number of pistils
    1
    Ovary position
    the ovary is above the point of petal and/or sepal attachment
    Petal and sepal arrangement
    the flower lacks sepals and petals
    Petal appearance
    NA
    Petal fusion
    NA
    Sepal appearance
    NA
    Sepal cilia (Ilex)
    NA
    Sepal tip glands
    NA
    Sepals fused only to sepals
    NA
    Stamen number
    • 10
    • 11
    • 12
    • 5
    • 6
    • 7
    • 8
    • 9
    Stamen position relative to petals
    NA
    Stamens fused
    the stamens are not fused to one another

  • Fruits or seeds

    Berry color
    NA
    Fruit type (general)
    the fruit is dry and splits open when ripe
    Fruit type (specific)
    the fruit is a capsule (splits along two or more seams, apical teeth or pores when dry, to release two or more seeds)
    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 upper side of leaf blade
    • the upper side of the leaf is fuzzy or hairy
    • the upper side of the leaf is not hairy, or has very few hairs
    Leaf blade base shape
    • The base of the leaf blade is cordate (heart-shaped, with rounded lobes)
    • the base of the leaf blade is truncate (ends abruptly in a more or less straight line as though cut off)
    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
    the leaf blade has tangled or woolly-looking hairs, without glands
    Leaf blade length
    30–80 mm
    Leaf blade scales
    there are no scales on the leaf blades
    Leaf blade shape
    • the leaf blade is orbicular (roughly circular, as wide as long)
    • 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 duration
    the leaves drop off in winter (or they wither but persist on the plant)
    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 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 simple (i.e., lobed or unlobed but not separated into leaflets)
    Leaves per node
    there is one leaf per node along the stem
    Specific leaf type
    the leaves are simple (i.e., lobed or unlobed but not separated into leaflets

  • Place

    Habitat
    terrestrial
    New England state
    Massachusetts
    Specific habitat
    man-made or disturbed habitats

  • Scent

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

  • Stem, shoot, branch

    Aerial roots
    the plant has no aerial roots
    Bark texture
    the bark of an adult plant is thin and smooth
    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
    Pith shape
    the outline of the pith in a twig is roughly round
    Twig papillae (Vaccinium species only)
    NA
    Twig winter color
    • brown
    • gray
    • yellow
    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

Occurs in wetlands or non-wetlands. (Wetland indicator code: FAC)

In New England

Distribution

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

Conservation status

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

Massachusetts
not applicable (S-rank: SNA)

From Flora Novae Angliae dichotomous key

7.  Populus tremula L. E

European poplar. MA. Waste areas.

1×7. Populus alba × Populus tremula → Populus ×‌canescens (Ait.) J.E. Smith is an uncommon hybrid poplar that has escaped from cultivation in CT, MA, ME, NH, RI, VT. It resembles P. alba in some aspects but has leaf blades that are merely dentate (i.e., the blades are not lobed or only scarcely so), the proximal ones sparsely to moderately tomentose abaxially with gray, brown-white, or sordid-white hairs (rather than bright white), and petioles that vary from compressed to subterete. The floral scales are prominently lacerate with 7–9 lobes, and the staminate flowers have 8–15 stamens (rather than floral scales merely dentate with many apical teeth and staminate flowers with 5–10 stamens in P. alba).

Native to North America?

No

Sometimes confused with

Populus tremuloides:
leaf blade regularly denticulate with mostly 18–30 teeth per margin up to 1 mm tall (vs. P. tremula, with leaf blade coarsely sinuate-dentate with mostly 5–10 teeth per margin taller than 1).
Popula grandidentata:
leaf blades narrow-ovate to broad-ovate, mostly 7–12 cm long, and terminal winter buds conspicuously pubescent (vs. P. tremula, with leaf blades +/- suborbicular, 2–8 cm long, and terminal winter buds glabrous).

Family

Salicaceae

Genus

Populus