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Erigeron speciosus

Species category

Flower, Weed

Common name

aspen fleabane

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 1.8–2.5 mm
  • Width 0.6–0.9 mm
  • Thickness 0.6–0.9 mm

Color

Light brown

Texture

Covered with short appressedAppressed:
Pressed close or lying flat against something.
 hairs

Other structures

Few strong longitudinal ribs

Identification notes

Long barbed pappusPappus:
Modified calyx in Asteraceae, composed of hairs, bristles, awns, or scales. The pappus-like structure attached to milkweed seeds is termed a coma. 
 that is usually broken down to short bristles.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Asteraceae

Valid name

Erigeron speciosus (Lindl.) DC.

Erigeron speciosus. Achenes are covered with short appressed hairs.
Erigeron speciosus. Achenes are covered with short appressed hairs.
Erigeron speciosus. Achenes with a long, barbed pappus that is usually broken down to short bristles.
Erigeron speciosus. Achenes with a long, barbed pappus that is usually broken down to short bristles.