Copse-bindweed is a slender annual vine in the buckwheat family that twines over fences and other plants. Native to temperate Eurasia, it has been introduced to the northeastern US, where it is easily mistaken for the native climbing false buckwheat. It is also called thicket bindweed.

Appearance

Growth form
An annual, twining vine with smooth, round stems that can climb 6–10 ft (2–3 m).
Leaves
Alternate, smooth-edged leaves shaped like an arrowhead or triangle, about 0.8–3 in (2–8 cm) long.
Flowers
Tiny flowers with five petal-like parts, white, pink, red, or greenish brown, borne in slender clusters 0.8–8 in (2–20 cm) long.
Fruit
A small black seedlike fruit, about 1/8 in (2.8–3.5 mm) long, wrapped in the dried flower parts, which grow cream to pale brown wings.

Look-alikes

Climbing false buckwheatFallopia scandens

Climbing false buckwheat has bigger fruiting flowers (about 1/4–3/8 in, 6.5–9.4 mm, vs. 4.2–6.5 mm), bigger fruits, and much longer lobes at the leaf base. Many specimens are hard to sort out even for botanists.

Why they get mixed upIt was once lumped with copse-bindweed and looks very similar.

Black-bindweedFallopia convolvulus

The fruiting flowers of black-bindweed have no wings, and its fruit is dull rather than slightly glossy.

Why they get mixed upBoth are smooth, twining weedy vines with arrow-shaped leaves.

Climbing buckwheatFallopia cristata

Its fruiting flowers are smaller (3.4–5.1 mm), and their wings are narrower, greener, and more irregular at the edges than copse-bindweed's cream to pale brown wings.

Why they get mixed upAnother winged-fruited Fallopia vine found in the same region.

Where it lives

Typical habitats
  • Roadsides
  • Waste areas
  • Dunes
  • Shores of rivers and ponds
Range
Introduced in the US. In New England it is recorded from Connecticut, Massachusetts, and Rhode Island, and it is also non-native in the New York City area. Because it is often confused with similar species, its true US range is still unclear.
Preferred conditions
Mostly grows in disturbed ground, and turns up in both wetlands and drier sites.

Name and classification

About the name
Formerly known as Polygonum dumetorum, and sometimes treated as a variety of climbing false buckwheat (Polygonum scandens var. dumetorum). The name "climbing false buckwheat" is also applied to this plant, which adds to the mix-up with Fallopia scandens.

Conservation

IUCN Red List
NENot EvaluatedNot yet assessed

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Copse-bindweed (Fallopia dumetorum) — identification, habitat & look-alikes | Moeyo