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Helianthus ciliaris

Species category

Weed

Common name

Texas blueweed

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

ObovateObovate:
Inverted egg shaped with apical end the broadest.

Size

  • Length 3–4 mm
  • Width 1–2 mm
  • Thickness 0.6–0.8 mm

Color

Gray and shiny with occasional black blotches

Texture

Smooth

Other structures

Small apicalApical:
The distal end of the fruit or seed away from the point of attachment or attachment scar.
 collar and rounded shoulders

Identification notes

AchenesAchene:
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.
 are oblong, compressed, and the apexApical:
The distal end of the fruit or seed away from the point of attachment or attachment scar.
 somewhat squared. Color gray to silvery- brown and surface smooth and lustrous. Some achenesAchene:
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.
 have some mottling. Scar slightly oblique and slightly notched.

Noxious weed seed categories

State Noxious Weed: Arkansas, California, Colorado, Georgia, Hawaii, Kansas, Louisiana, New Mexico, Oklahoma, South Carolina, Texas

AOSA examination list

Included

Nomenclature

Family

Asteraceae

Valid name

Helianthus ciliaris DC.

Helianthus ciliaris. Gray and shiny achenes with a slightly oblique and notched scar.
Helianthus ciliaris. Gray and shiny achenes with a slightly oblique and notched scar.
Helianthus ciliaris. Gray and shiny achenes with occasional black blotches.
Helianthus ciliaris. Gray and shiny achenes with occasional black blotches.