black bindweed

(Fallopia convolvulus)

               
Conservation Status

IUCN Red List

not yet assessed

black bindweed

NatureServe

NNA - Not applicable

SNA - Not applicable

Minnesota

not listed

Wetland
Indicator
Status

Great Plains

FACU - Facultative upland

Midwest

FACU - Facultative upland

Northcentral & Northeast

FACU - Facultative upland

Nativity

Native of northern Africa, Europe, Asia, and the Indian subcontinent. Introduced and naturalized in North America.

Occurrence

Common

Habitat

Cultivated grain fields, railroads, roadsides, disturbed areas. Full sun.

Flowering

May to October

     
Flower Color

Greenish-white

     
Height

Twining, 20 to 40 long

     

Identification

This is an annual vine that rises on a single stem from deep, fibrous roots. It does not produce rhizomes. It climbs by spiraling counter-clockwise (twining) around the stem of another plant.

The stems are trailing or twining, 20 to 40 long, light green or bright red, not woody (herbaceous), not glaucous, slightly angled, and freely branched at the base. They are somewhat rough to the touch due to the presence of short, stiff hairs that are often arranged in lines. The stems and leaves do not have a milk latex.

The leaves are alternate, widely spaced, ¾ to 2 long, and ¾ to 2 wide. They are on 3 16 to 2 long leaf stalks. The leaf stalks are somewhat roughened with lines of short, stiff hairs. There is a small, hairless, membraneous sheath (ocrea) that surrounds the stem at the base of each leaf stalk. The leaf blade is heart-shaped or arrow-shaped with the basal lobes sometimes directed inwards, though this may not be apparent. It is sharply pointed at the tip with curved sides along the tip. The upper surface is hairless. The lower surface is usually powdery (mealy) and is not glaucous. The margins are untoothed and somewhat wavy.

The inflorescence is an unbranched, spike-like, ¾ to 4 long arrangement of several clusters of 3 to 6 flowers each at the end of the stems and branches and also rising from the leaf axils. The clusters are stalkless or on stalks up to 4 long. The individual flowers are on 1 32 to long stalks. The central axis of the inflorescence (rachis) is somewhat roughened with lines of short, stiff hairs.

Each flower is to 3 16 long. There are 5 elliptic to inversely egg-shaped, petal-like sepals (tepals) and no petals. The tepals are greenish white and often have a pink or purple tinge at the base. The outer 3 tepals are ridged (keeled) but not winged.

The fruit is a dull, black, slightly roughened, 3-angled achene. It is entirely enclosed within the 3 green, persistent, keeled but not winged sepals.

 
Similar
Species

Climbing false buckwheat (Fallopia scandens) flowers and fruits are winged. The sides of the black achene are shiny and smooth.

Fringed black bindweed (Fallopia cilinodis) ocrea has stiff, downward-pointing hairs.

Field bindweed (Convolvulus arvensis) is a longer vine, reaching up to 6½ in length. The stems and leaves have a milky latex. The leaf stalk does not have an ocrea at the base. The flower is large, showy, and trumpet-shaped. The fruit is a capsule.

Hedge bindweed (Calystegia sepium ssp. angulata) is a longer vine, reaching up to 10 in length. The stems and leaves have a milky latex. The leaf stalk does not have an ocrea at the base. The flower is large, showy, and trumpet-shaped. The fruit is a capsule.


Distribution Distribution Map   Sources: 2, 3, 4, 5, 7, 22, 28.

Comments

This species is found in every state, province, and territory in North America except Nunavut.


Taxonomy

Family:

Polygonaceae (buckwheat)

 

Subfamily:

Polygonoideae

 

Tribe:

Polygoneae

 
Synonyms

Bilderdykia convolvulus

Polygonum convolvulus var. convolvulus

Reynoutria convolvulus

Tiniaria convolvulus

 
Common
Names

black bindweed

climbing buckwheat

cornbind

dullseed cornbind

wild buckwheat


 

 

 

 

 

 

 

 

 

 

 

Glossary

achene

A dry, one-chambered, single-seeded fruit, formed from a single carpel, with the seed attached to the membranous outer layer (wall) only by the seed stalk; the wall, formed entirely from the wall of the superior ovary, does not split open at maturity, but relies on decay or predation to release the contents.

 

glaucous

Pale green or bluish gray due to a whitish, powdery or waxy film, as on a plum or a grape.

 

herbaceous

A plant without a persistent, above-ground, woody stem, with the leaves and stems usually dying back to the ground at the end of the growing season.

 

keeled

Folded, as in a grass blade, or with a raised ridge, as in a grass sheath; like the keel of a boat.

 

ocrea

A sheath around the stem at the base of a petiole formed from the stipules; a feature of many members of the Polygonaceae.

 

rachis

The main axis of a compound leaf, appearing as an extension of the leaf stalk; the main axis of an inflorescence.

 

rhizome

A horizontal, usually underground stem. It serves as a reproductive structure, producing roots below and shoots above at the nodes.

 

sepal

An outer floral leaf, usually green but sometimes colored, at the base of a flower.

 

tepal

Refers to both the petals and the sepals of a flower when they are similar in appearance and difficult to tell apart. Tepals are common in lilies and tulips.

 

trailing

Prostrate on the ground and creeping, but not rooting at the tip.

 

twining

Growing in a spiral usually around a stem of another plant that serves as support.

       

Visitor Photos

   
Share your photo of this plant.

       
       
       
       

MinnesotaSeasons.com Photos

   

Plant

  black bindweed   black bindweed
       

Inflorescence

  black bindweed    
       

Leaves

  black bindweed   black bindweed
       

Infructescence

  black bindweed   black bindweed
       
       

 

Camera

     

Slideshows

   
     
     
     

 

slideshow

     

Visitor Videos

   
Share your video of this plant.

     
     

Other Videos

 
  Leaf-cutter Bee (Megachile centuncularis) at work
Jochem Kuhnen
 
   
 
About

Published on Jul 8, 2012

A Leaf-cutter Bee (Megachile centuncularis) at work cutting out a fragment of Black Bindweed (Fallopia convolvulus). There were hardly any intact leafs left! Filmed in Nijmegen's city centre on July 7th 2012.

 
     

 

Camcorder

Last Updated:

About Us | Privacy Policy | Contact Us | © 2017 MinnesotaSeasons.com. All rights reserved.