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Vermont Invasives

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Border privet

Ligustrum obtusifolium

  • Read more about Border privet
  • Border privet: leaves are simple, opposite and has small, white flowers with an unpleasant scent.
  • Border privet: leaves are simple, opposite and has small, white flowerswith an unpleasant scentwith an unpleasant scent with an unpleasant scent.
  • Border privet: tall shrub, with multiple stems, leafy branches.
  • Border privet: tall shrub, with multiple stems, leafy branches.
  • Look-alike: northern spicebush has alternately arranged leaves and a distinct smell when the leaves are crushed.

European Spindle-tree

Euonymus europaeus

  • Read more about European Spindle-tree
  • European spindle-tree: 4-lobed capsule, 1/2 inch across, pink to purple in color, splits open to reveal dark red seeds, ripens in fall.
  • European spindle-tree: flowers are inconspicuous (1/3 inch across), 4 greenish-white petals with purple anthers, appearing in late spring in multiple branched clusters.
  • European spindle-tree: infestation.
  • European spindle-tree: flowers are inconspicuous (1/3 inch across), 4 greenish-white petals with purple anthers, appearing in late spring in multiple branched clusters.
  • European spindle-tree: opposite, simple, elliptical, 2 1/2 to 4 inches long, finely serrated, long pointed, green above, paler and may be pubescent below.
  • Look-alike: winged burning bush (Euonymus alatus) also an invasive species.

Narrow-leaved bitter-cress

Cardamine impatiens

  • Read more about Narrow-leaved bitter-cress
  • Narrow-leaved bitter-cress: basal rosette of leaves are pinnately divided. The leaves have a pair of fleshy blunt projections ('ears') turned downward at their base, which is an important diagnostic characteristic.
  • Narrow-leaved bitter-cress: basal rosette of leaves are pinnately divided.
  • Narrow-leaved bitter-cress: white flowers are small, being up to 0.1 in
  • Narrow-leaved bitter-cress: leaves (6-20) are thin and membranous.
  • Narrow-leaved bitter-cress: fruit is a slender, upward-growing, string bean-like silique.
  • Look-alike: Pennsylvania Bittercress (Cardamine pensylvanica). This plant does not have fleshy blunt projections ('ears') when leaves are removed.

Porcelain berry

Ampelopsis glandulosa var. brevipedunculata

  • Read more about Porcelain berry
  • Porcelain berry: fruits are small berries that range from yellow to purple to blue in color.
  • Porcelain berry: alternate leaves are simple and heart-shaped with coarse teeth along the margins. The leaves vary from slightly lobed to deeply dissected.
  • Porcelain berry: infestation.
  • Porcelain berry: inconspicuous flowers (white to green) develop in small clusters.
  • Porcelain berry: fruits are small berries that range from yellow to purple to blue in color.
  • Look-alike: heartleaf peppervine (Ampelopsis cordata) leaves are toothed to obscurely lobed.

Maple, Amur

Acer ginnala

  • Read more about Maple, Amur
  • Amur maple: leaf has three lobes, the center lobe is much more prominent than the other two lobes.
  • Amur maple: leaf has three lobes, the center lobe is much more prominent than the other two lobes.
  • Amur maple: leaf has three lobes, the center lobe is much more prominent than the other two lobes.
  • Amur maple: reddish fruit (samaras), which hang on the tree until late fall, have nearly parallel wings.
  • Amur maple: bark of the tree is smooth and gray.
  • Look-alike: red maple

Common Barberry

Berberis vulgaris

  • Read more about Common Barberry

Tree-of-heaven

Ailanthus altissima

  • Read more about Tree-of-heaven
  • Tree-of-heaven: leaves are pinnately compound and 1-4 ft. in length with 10-41 leaflets.
  • Tree-of-heaven: fruit produced on female plants are tan to reddish, single winged and can be wind or water-dispersed.
  • Tree-of-heaven: infestation.
  • Tree-of-heaven: leaves have gland on underside of the leaf.
  • Look-alike: staghorn sumac (Rhus hirta) has toothed leaf edges, and lacks the tell-tale glands that Tree-of-heaven have on the underside of the leaf.

Honeysuckle, Vine

Lonicera japonica

  • Read more about Honeysuckle, Vine
  • Vine honeysuckle: whitish-pink flowers develop in the axils of the leaves. The flowers turn cream-yellow as they age.
  • Vine honeysuckle: infestation.
  • Vine honeysuckle: small shiny globular fruits turn from green to black as they ripen.
  • Look-alike: trumpet honeysuckle (Lonicera sempervirens).
  • Look-alike: twining honeysuckle (Lonicera dioica).

Swallowwort, Pale

Vincetoxicum rossicum

  • Read more about Swallowwort, Pale
  • Pale swallowwort: flowers are dark pink to deep red, 5-petaled, star-shaped and appear in clusters.
  • Pale swallowwort: flowers are dark pink to deep red, 5-petaled, star-shaped and appear in clusters.
  • Pale swallowwort: fruits are similar to milkweed pods. They are slender, 2-3 in. long and split to reveal small seeds with tufts of white hairs.
  • Pale swallowwort: infestation.
  • Pale swallowwort: fruits are similar to milkweed pods. They are slender, 2-3 in. long and split to reveal small seeds with tufts of white hairs.
  • Look-alike: black swallowwort (also an invasive species) has oval leaves and dark blue/purple flowers.

Honeysuckles, Shrub

Lonicera sp.

  • Read more about Honeysuckles, Shrub
  • Morrow’s honeysuckle: hairy underside of leaf, white flowers, leaves egg shape with slight taper at tip.
  • Amur honeysuckle: hairy leaf that is egg shaped with a long taper at tip, white flowers that yellow with time
  • Shrub Honeysuckle: twinned berries, that are generally red to yellow in color
  • Tatarian honeysuckle: flowers are shades of pink-red and asymmetrical, leaves are not hairy, leaves are egg shaped with rounded base
  • Bell Honeysuckle: variable characteristics, but usually has pink flowers.
  • Shrub Honeysuckle: hollow, brown pith
  • Look-alike: American honeysuckle has yellow tubular flowers, leaves can be hairy, and has a solid, white pith. This plant is native.

Pagination

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Site by Tamarack Media Cooperative. Cover image by Brian Leedy.