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Vermont Invasives

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Winter Bird Monitoring Walk

  • Read more about Winter Bird Monitoring Walk
Saturday, February 18, 2017 - 8:00am
  • Field Trip
The Great Backyard Bird Count is an annual four-day event that engages bird watchers of all ages in counting birds to create a real-time snapshot of where the birds are.

False spiraea

Sorbaria sorbifolia

  • Read more about False spiraea
  • False spiraea: leaf blade is compound, made up of two or more discrete leaflets, there is one leaf per node along the stem, the edge of the leaf blade has teeth.
  • False spiraea: infestation.
  • False spiraea: small white flowers born on 4 to 10-inch panicle.
  • Look-alike: staghorn sumac (Rhus hirta).
  • Look-alike: staghorn sumac (Rhus hirta), flowers are greenish and the fruits are bright red.

Black Locust

Robinia pseudoacacia

  • Read more about Black Locust
  • Black locust: clusters of sweetly perfumed pure white pea flowers in spring.
  • Black locust: clusters of sweetly perfumed pure white pea flowers in spring.
  • Black locust: leaves are pinnately compound, with small oval leaflets.
  • Black locust: leaves are pinnately compound, with small oval leaflets.
  • Black locust: seed, bean-like pod.
  • Black locust: bark and thorns.
  • Black locust: bark of black locust is light brown, rough, and becomes very furrowed with age.
  • Black locust: tree form.
  • Look-alike: honey locust (also non-native to the Northeast) has three-pointed thorns.

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.

Knotweed, Giant

Fallopia sachalinensis

  • Read more about Knotweed, Giant
  • Giant knotweed: plants forms dense stands.
  • Giant knotweed: alternate, simple, dark green. Leaves are 6-14 inches long and have a heart-shaped base coming narrow to a point.
  • Giant knotweed: numerous small, greenish-white flowers appear in the leaf axils of the upper stems.
  • Giant knotweed: plants can grow to over 12 feet tall.
  • Look-alike: invasive Japanese knotweed (left) looks like Giant knotweed (right), but has squared off leaf base, where Giant knotweed is more "heart-shaped".

Mile-a-minute vine

Persicaria perfoliata

  • Read more about Mile-a-minute vine
  • Mile-a-minute vine: alternate leaves are triangular, light green, 1-3 in. wide and barbed on the undersurface.
  • Mile-a-minute vine: leaf and stem.
  • Mile-a-minute vine: infestation.
  • Mile-a-minute vine: small, white, inconspicuous flowers.
  • Mile-a-minute vine: alternate leaves are triangular, light green.
  • Mile-a-minute vine: flowers inside cup-like leaf bracts.
  • Mile-a-minutevine:  fruiting spike, ocreae, and barbs.
  • Look-alike: hedge bindweed (Calystegia sepium) has triangular leaves with pointed tips and angular, heart‐shaped base.
  • Look-alike: hedge bindweed (Calystegia sepium) has triangular leaves with pointed tips and angular, heart‐shaped base.

Reed canary grass

Phalaris arundinacea

  • Read more about Reed canary grass
  • Reed canary grass: infestation.
  • Reed canary grass: inflorescence color changes from green to purplish to tan as the seeds mature.
  • Reed canary grass: ligule is transparent (where blade and sheath come together).
  • Reed canary grass: reddish rhizomes near the soil surface.
  • Reed canary grass: inflorescence color changes from green to purplish to tan as the seeds mature.
  • Look-alike: native bluejoint grass (Calamagrostis canadensis) also has a transparent-white ligule, but is less coarse textured than RCG, has smaller seed with fine hairs used for wind dispersal, can have dark colored joints, and the rhizomes near the soil surface are not reddish colored.

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.

Pagination

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