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Oligoneuron album

Species category

Weed

Common name

prairie goldenrod, white flat-top goldenrod, upland white aster, verge-d'or faux-ptarmica

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 2.5–3.3 mm 
  • Width 0.6–0.8 mm 
  • Thickness 0.6–0.8 mm 

Color

White

Texture

Smooth with some strong longitudinal ribs

Other structures

Strong indentation occurs below the pappusPappus:
Modified calyx in Asteraceae, composed of hairs, bristles, awns, or scales. The pappus-like structure attached to milkweed seeds is termed a coma. 
 crown.

Identification notes

BasalBasal:
The base of the fruit or seed opposite the apical end.
 end with an elongate attachment.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Asteraceae

Valid name

Oligoneuron album (Nutt.) G.L. Nesom

Synonyms

Aster ptarmicoides (Nees) Torr. & A. Gray
Aster ptarmicoides (Nees) Torr. & A. Gray var. georgianus A. Gray
Doellingeria ptarmicoides Nees
Inula alba Nutt.
Solidago asteroides Semple
Solidago ptarmicoides (Nees) B. Boivin
Unamia alba (Nutt.) Rydb.

Oligoneuron album . Achenes with an elongate attachment on the basal end.
Oligoneuron album. Achenes with an elongate attachment on the basal end.