- You are here:
- Dichotomous Key
- Salicaceae
- Populus
- Populus key for reproductive material
- Populus tremula
Populus tremula — European poplar
Copyright: various copyright holders. To reuse an image, please click it to see who you will need to contact.
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
Native: indigenous.
Non-native: introduced (intentionally or unintentionally); has become naturalized.
County documented: documented to exist in the county by evidence (herbarium specimen, photograph). Also covers those considered historical (not seen in 20 years).
State documented: documented to exist in the state, but not documented to a county within the state. Also covers those considered historical (not seen in 20 years).
Note: when native and non-native populations both exist in a county, only native status is shown on the map.
Found this plant? Take a photo and post a sighting.
Characteristics
- Habitat
- terrestrial
- New England state
- Massachusetts
- Growth form
- the plant is a tree
- Leaf type
- the leaf blade is simple (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
-
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 (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 (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
- unranked (S-rank: SNR)
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