|  back  | forward |

Erigeron annuus - (image 1 of 5)

Taxonomy

Family: Asteraceae

Habitat

Disturbed woodlands, pastures, abandoned fields, cultivated and waste ground.

Associates

Distribution

Widespread.

Morphology

Annual or rarely biennial to 1.5 m; stems with spreading pubescence. Leaves numerous, lanceolate to ovate, serrate to dentate; cauline leaves often more than 1 cm wide, tapering at the bases, broadly lanceolate or wider, usually sharply toothed except the uppermost; basal leaves elliptic to suborbicular, to 10 cm long and 7 cm wide, sharply dentate or even pinnatifid near the base, abruptly tapered to long petioles. Heads several to many; involucres 3-5 mm, finely glandular and with long, flattened, transparent hairs; disk 6-10 mm wide; rays 80-125, white or rarely pink or bluish, to 10 mm long and 1 mm wide; disk corollas 2.0-2.8 mm. Achenes 2-nerved; pappus of disk flowers double, with 10-15 bristles and several very short, slender scales.

Notes

Flowers early May to November

Wetland indicator: Facultative -

Often forms a large rosette of leaves prior to flowering.

References

Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Ed.
The New York Botanical Garden. Bronx, NY

Swink, F. and G. Wilhelm. 1994. Plants of the Chicago Region.
Indiana Academy of Science. The Morton Arboretum. Lisle, Illinois.

Home