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Mikania cordata

Species category

Weed

Common name

heartleaf hempvine, mile-a-minute

Diagnostic characters

Planting unit

AcheneAchene:
A dry, hard, one-chambered, one-seeded indehiscent fruit, as in buckwheat (Fagopyrum) or sunflower (Helianthus). The fruit wall is not united with the seed coat.

Shape

Oblanceolate

Size

  • Length 2.1–2.3 mm
  • Width 0.4–0.5 mm
  • Thickness 0.4–0.5 mm

Color

Dark brown with white ribs

Texture

GlandularGlandular:
The surface appearing to be covered with minute glands or spheres.

Other structures

Scar at the narrow base is round and hollow.

Identification notes

PappusPappus:
Modified calyx in Asteraceae, composed of hairs, bristles, awns, or scales. The pappus-like structure attached to milkweed seeds is termed a coma. 
 of many white and rough hairs.

Noxious weed seed categories

Federal

Learn more on ITP's Federal Noxious Weed Disseminules tool.

AOSA examination list

Not included

Nomenclature

Family

Asteraceae

Valid name

Mikania cordata (Burm. f.) B.L. Rob.

Synonyms

Eupatorium cordatum Burm. f.

Mikania cordata. Achenes with a pappus of many white and rough hairs. Photo by Julia Scher, USDA-APHIS-PPQ.
Mikania cordata. Achenes with a pappus of many white and rough hairs. Photo by Julia Scher, USDA-APHIS-PPQ.
Mikania cordata. Glandular achenes. Photo by Julia Scher, USDA-APHIS-PPQ.
Mikania cordata. Glandular achenes. Photo by Julia Scher, USDA-APHIS-PPQ.
Mikania cordata. Achenes with a round and hollow scar at the basal end. Photo by Julia Scher, USDA-APHIS-PPQ.
Mikania cordata. Achenes with a round and hollow scar at the basal end. Photo by Julia Scher, USDA-APHIS-PPQ.
Mikania cordata. Achenes with a pappus of many white and rough hairs. Photo by Julia Scher, USDA-APHIS-PPQ.
Mikania cordata. Achenes with a pappus of many white and rough hairs. Photo by Julia Scher, USDA-APHIS-PPQ.