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Vermont Invasives

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Forest

Barberry, Common

Berberis vulgaris

  • Read more about Barberry, Common
  • Common barberry: oval leaves, with toothed edges, flowers are pale yellow and appear in droopy clusters.
  • Common barberry: oval leaves, with toothed edges, flowers are pale yellow and appear in droopy clusters.
  • Common barberry: oval leaves, with toothed edges, flowers are pale yellow and appear in droopy clusters.
  • Common barberry: oval leaves, with toothed edges, flowers are pale yellow and appear in droopy clusters.
  • Common barberry: oval leaves, with toothed edges.
  • Common barberry: berries are red ellipsoids which are less than 0.3 in. in length and contain 1-3 small black seeds.
  • Common barberry: berries are red ellipsoids which are less than 0.3 in. in length and contain 1-3 small black seeds.
  • Common barberry: spines are three-pronged.
  • Common barberry: spines are three-pronged.
  • Common barberry: infestation.
  • Common barberry: infestation.
  • Look-alike: invasive Japanese barberry has a single thorn, leaf edges are smooth, and flowers occur individually or in small clusters.

White poplar

Populus alba

  • Read more about White poplar
  • White poplar: bark on young trees is smooth and greenish white becoming gray and wrinkled, as trees age.
  • White poplar:infestation.
  • White poplar: leaves resemble maple leaves, but the topside of leaves are shiny, dark green while the underside is bright white and hairy.
  • White poplar: fruit are small, hairy seed pods that are spread by wind.
  • Look-alike: bigtooth aspen (Populus grandidentata) has leaves that are large, coarse and have blunt teeth are all along the edges.
  • Look-alike: bigtooth aspen (Populus grandidentata) bark is smooth and thin, green or yellowish gray on younger branches and the upper trunk. Older bark at the base of trunk becomes thick and dark gray/brown with coarse ridges and deep furrows.

Butterbur Sweet-coltsfoot

Petasites hybridus

  • Read more about Butterbur Sweet-coltsfoot
  • Butterbur sweet-coltsfoot: large heart-shaped leaves and seeds are attached to plumes of fine white bristles.
  • Butterbur sweet-coltsfoot: pinkish red stalks emerge and blooms occur before full leaf out in the spring.
  • Look-alike: common burdock (Arctium minus).
  • Look-alike: wild ginger (Asarum canadense).

Princess Tree

Paulownia tomentosa

  • Read more about Princess Tree
  • Princess tree: large flowers (2 in. long) are fragrant and light violet-pink, appearing in showy upright clusters (8-12 inches in length). They have tubular corollas, ending in 5 unequal lobes.
  • Princess tree: bark is gray-brown and rough, often developing lighter-colored shallow vertical fissures.
  • Princess tree: form.
  • Princess tree: fruits (1-2 in. long, 1-1.5 in. wide) are egg-shaped capsules, divided into 4 inner compartments that contain the seeds. Fruits are light green in the summer, becoming dark brown in the winter, and persist in clusters on the tree until the following spring.
  • Princess tree: flowers.
  • Look-alike: northern catalpa (Catalpa speciosa), flower.
  • Look-alike: northern catalpa (Catalpa speciosa), seed pods.

Wall-lettuce

Mycelis muralis

  • Read more about Wall-lettuce
  • Wall Lettuce: basal and lower stem leaves are 2.5-7 in. long, 1-3 in. wide, glabrous and deeply lobed, with broad, terminal segments.
  • Wall Lettuce: flower head is comprised of 5 yellow, strap-shaped ray florets.
  • Wall Lettuce: infestation.
  • Look-alike: orange hawkweed (Hieracium aurantiacum), non-native, has orange-red ray flowers.
  • Look-alike: perennial sowthistle (Sonchus arvensis) has loose branching clusters of bright yellow, dandelion-like flowers.

Honeysuckle, Dwarf shrub

Lonicera xylosteum

  • Read more about Honeysuckle, Dwarf shrub
  • Dwarf shrub honeysuckle: white flowers develop in pairs in the axils of the leaves.
  • Dwarf shrub honeysuckle: fruit, dark red berries.
  • Dwarf shrub honeysuckle: infestation.
  • Look-alike: western white honeysuckle (Lonicera albiflora).

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.

Pagination

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