Scientific Name: Polygonum convolvulus

Common Name: wild buckwheat

Other Common Names: black bindweed

Leaves: Leaves are alternate, triangular to heart-shaped with a pointed tip. Basal lobes point inward toward the petiole. Leaves have a continuous, untoothed margin.

Identifying Characteristics: The ocrea at base of each petiole and the triangular leaves with basal lobes that point inward are both characteristics that help to distinguish this weed from most other plants. This weed is often confused with Field Bindweed (<a href='../../weedimg/79'>Convolvulus arvensis</a>). However, the inward-pointing bases of wild buckwheat leaves versus the outward-pointing bases of field bindweed leaves are characteristics that may be used to distinguish between the two. Additionally, the ocrea present in wild buckwheat and not in field bindweed is a distinguishing characteristic.An annual twining or trailing vine that may reach as much as 3 1/2 feet in length.

Flower Seed Head: Flower: Flowers are clustered in racemes from the leaf axils (the position between the stem and a leaf), are inconspicuous and greenish-white in color.Roots: Fibrous root system.

Seed Fruit: Fruit: A 3-angled achene that is black, 3-4 mm long, and enclosed in the green, winged sepals.

Where Found: Wild buckwheat is found throughout the United States.

  • Life cycle: summer annual

  • Milky sap: Not Present

  • Plant type: Vine

  • Thorns: Not Present

  • Plant family: Polygonaceae

  • Leaf arrangement: alternate

  • Leaf shape: heart

  • Ochrea: Present

  • Leaf margin: entire

  • Stem hairs: no hairs

  • Flower color: purple; white

  • Growth habit: vine

  • Stem: round or oval

  • Leaf structure: simple

  • Leaf hairs: has hairs

  • Flower diameter: pencil

  • Flower symmetry: not symmetrical

  • Root structure: taproot

  • Leaf stalk: shorter than leaf; longer than leaf