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Herrickia glauca

Species category

Flower

Common name

blue-leaf aster, Gray's aster

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 4–4.5 mm
  • Width 0.6–0.8 mm
  • Thickness 0.6–0.8 mm

Color

Brown

Texture

GranularGranular:
Resembling or consisting of small grains or particles.
 between ribs

Other structures

Strong longitudinal ribs with lighter brown color

Identification notes

Well-developed 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 with slight indentation below.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Asteraceae

Valid name

Herrickia glauca (Nutt.) Brouillet

Synonyms

Aster glaucus (Nutt.) Torr. & A. Gray
Aster glaucus (Nutt.) Torr. & A. Gray var. glaucus
Eurybia glauca (Nutt.) G.L. Nesom
Aster glaucodes S.F. Blake
Aster glaucodes S.F. Blake subsp. glaucodes

Herrickia glauca.  Achene with longitudinal ribs and a well-developed pappus crown. 
Herrickia glauca. Achene with longitudinal ribs and a well-developed pappus crown.