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Polygonum convolvulus L.

Polygonum convolvulus L. var. convolvulus

Bilderdykia convolvulus (L.) Dumort.

Fallopia convolvulus (L.) Á. Löve

Reynoutria convolvulus (L.) Shinners

Tiniaria convolvulus (L.) Webb & Moq.

Fallopia convolvulus (L.) A. Löve

Black bindweed, wild buckwheat, false buckwheat

KingdomPlantaePlants, but not fungi, lichens, or algae
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionMagnoliophytaFlowering plants, also known as angiosperms
ClassMagnoliopsidaDicotyledons—plants with two initial seed leaves
SubclassCaryophyllidaeCacti, many other succulents, carnivorous plants, and leadworts
OrderCaryophyllalesIncludes cacti, carnations, amaranths, ice plants, and many carnivorous plants
FamilyPolygonaceaeKnotweed or smartweed family
GenusPolygonumGreek poly, “many,” and gonu, “knee,” for the swollen jointed stems
SpeciesconvolvulusFrom Latin convolvere, “to twine around”

About plant names...

Wild buckwheat is a European native. It is a vine that snakes along the ground or clambers over other plants or anything else it can latch onto, winding itself in a clockwise direction around supports. Plants are up to 3' (1 m) long. At points where leaves attach there is an ocrea, or sheath. Leaves are alternate and roughly triangular to heart-shaped, with smooth edges. The lower corners of each triangle are pointed inward toward the leaf petiole (stem). Leaves are ½-2" (1.5-6 cm) × ¼-1" (7-30 mm) wide. Flowers are small, ⅛" (4 mm) each, in long thin clusters, sort of weird-looking, greenish-white to greenish-pink.

 

Polygonum convolvulus (black bindweed, wild buckwheat, false buckwheat)

9/18/2010 · Nashua River Rail Trail, Groton Center, Groton, MA
≈ 7 × 4½" (17 × 11 cm) ID is uncertain

Polygonum convolvulus (black bindweed, wild buckwheat, false buckwheat)

9/18/2010 · Nashua River Rail Trail, Groton Center, Groton, MA
≈ 9 × 6" (22 × 14 cm) ID is uncertain

Polygonum convolvulus (black bindweed, wild buckwheat, false buckwheat)

9/11/2010 · Nashua River Rail Trail, Groton Center, Groton, MA
≈ 15 × 10" (39 × 26 cm)

Some similar species:

 
Convolvulus arvensis
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Polygonum convolvulus

Polygonum scandens
Common Name

field bindweed

black bindweed

climbing false buckwheat
Plant Vines are 20-79" (50-200 cm) high. Vine up to 3' (1 m) long. At leaf nodes there is an ocrea. Vines up to 20' (6.1 m) long. Stems are light green to bright red, almost hairless. Where leaves attach to the stem, there is a protective sheath, or ocrea
Flowers Trumpet-shaped, ⅜-⅞" (1-2.5 cm) in diameter, and white or pale pink. Small bracts are separate from the flowers. Small, greenish-pink to greenish-white, in racemes (bunches); individual flowers are ⅛" (4 mm) long, racemes are up to 2½" (6.3 cm) long Racemes are 2-8" (5-20 cm) long, with small greenish flowers.
Leaves ¾-1¾" (2-5 cm) × ⅜-1" (1-3 cm) wide, either linear or shaped like arrowheads (sagittate). Alternate, triangular or heart-shaped, lower corners of leaves aim inward toward the petiole (leaf stem) Ovate, approaching sagittate (shaped like an arrowhead), up to 2" (5 cm) × 4" (10 cm). Leaf petioles are up to 1½" (3.8 cm) long
Fruit Seeds ⅛" (3.2 mm) long, with two flat sides and a convex side, like an orange segment. Three-sided, with a single dull black seed Greenish, with white or pink borders.
Range/ Zones

Type Wild Wild Wild

 

Online References:

Polygonum convolvulus on

Polygonum convolvulus on

Polygonum convolvulus on the Virginia Tech Weed Identification Guide

Polygonum convolvulus on Ontario Wildflowers

Polygonum convolvulus on Wikipedia

Polygonum convolvulus on CalPhotos

Polygonum convolvulus on SEINet—the Southwest Environmental Information Network

References:

Newcomb, Lawrence, Morrison, Gordon (Illus.), Newcomb’s Wildflower Guide, Little, Brown and Company, 1977, p. 322

Peterson, Roger Tory, McKenny, Margaret, Peterson Field Guides: A Field Guide to Wildflowers of Northeastern and North Central North America, Houghton Mifflin, 1968, p. 380

Polygonum convolvulus (black bindweed, wild buckwheat, false buckwheat)

Note the climbing False Buckwheat (Polygonum scandens) overtaking the loosestrife. · 7/28/2009 · Near Nashua River Boat Ramp, Groton, MA
≈ 30 × 44" (75 × 112 cm)

Polygonum convolvulus (black bindweed, wild buckwheat, false buckwheat)

9/3/2009 · Nashua River Rail Trail, Ayer, MA
≈ 6 × 9" (14 × 22 cm) ID is uncertain

Polygonum convolvulus (black bindweed, wild buckwheat, false buckwheat)

9/18/2010 · Nashua River Rail Trail, Groton Center, Groton, MA
≈ 8 × 5" (19 × 13 cm) ID is uncertain

Polygonum convolvulus description by Thomas H. Kent, last updated 16 Sep 2020.

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Polygonum convolvulus (black bindweed, wild buckwheat, false buckwheat)

9/3/2009 · Nashua River Rail Trail, Ayer, MA
≈ 5 × 8" (13 × 19 cm) ID is uncertain

Polygonum convolvulus (black bindweed, wild buckwheat, false buckwheat)

9/3/2009 · Nashua River Rail Trail, Ayer, MA
≈ 9 × 6" (23 × 15 cm) ID is uncertain

Polygonum convolvulus (black bindweed, wild buckwheat, false buckwheat)

9/3/2009 · Nashua River Rail Trail, Ayer, MA
≈ 6 × 9" (14 × 22 cm) ID is uncertain

Range:

About this map...