Blooms: June-September
Habit: herb
Duration: annual
Origin: Introduced
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; native to eastern North America and widely introduced in other areas of North America.
Habitat: Weed of moist, disturbed soil.
Habit: herb
Duration: annual
Origin: Introduced
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; native to eastern North America and widely introduced in other areas of North America.
Habitat: Weed of moist, disturbed soil.
Species Description:
General: Annual, 6-15 dm. tall, the stem with long, spreading hairs below the inflorescence.
Leaves: Leaves ample, generally toothed, the cauline leaves broadly lanceolate to ovate.
Flowers: Inflorescence large and usually leafy; involucre 3-5 mm. high, finely glandular and sparsely long-hairy; rays 80-125, white to lavender, 0.5-1 mm. wide and up to 10 mm. long; disk corollas 2-2.8 mm. long; pappus of 10-15 very fragile bristles and some short, bristly scales, the bristles wanting in the ray flowers.
General: Annual, 6-15 dm. tall, the stem with long, spreading hairs below the inflorescence.
Leaves: Leaves ample, generally toothed, the cauline leaves broadly lanceolate to ovate.
Flowers: Inflorescence large and usually leafy; involucre 3-5 mm. high, finely glandular and sparsely long-hairy; rays 80-125, white to lavender, 0.5-1 mm. wide and up to 10 mm. long; disk corollas 2-2.8 mm. long; pappus of 10-15 very fragile bristles and some short, bristly scales, the bristles wanting in the ray flowers.
Accepted Name:
Erigeron annuus (L.) Pers.Synonyms:
Aster annuus L.
Erigeron annuus (L.) Persoon var. discoideus (Victorin & J. Rousseau) Cronquist
Treated in Flora of the PNW as:
Erigeron annuus
Additional Resources:
PNW Herbaria Specimens: View list of Erigeron annuus specimens in the Consortium of Pacific Northwest Herbaria database.
WTU Herbarium Specimens: View list of Erigeron annuus specimens in the WTU Herbarium database.
Washington Flora Checklist: Erigeron annuus treatment.
E-Flora BC: Erigeron annuus atlas page.
CalPhotos: Erigeron annuus images.
USDA Plants Database: Erigeron annuus.
Jim Riley
G. D. Carr, 2009
G. D. Carr, 2009
G. D. Carr, 2009
G. D. Carr, 2009
G. D. Carr, 2009
G. D. Carr, 2009
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