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Bidens coronata - (image 1 of 4)

Taxonomy

Family: Asteraceae

Habitat

Marshy areas. Disturbed or burned bogs. Calcareous wet prairies and sedge meadows (narrow leaved form)

Associates

In marshes with Asclepias incarnata, Bidens cernua, Thelyptris palustris, Eupatorium maculatum, Eupatorium perfoliatum, Leersia oryzoides, Sagittaria latifolia, Typha latifolia.

Distribution

MA, southern Ontario, northern WI, and eastern MN, south to NC, KY, and NE.

Morphology

Annual or biennial to 1.5 m; glabrous throughout. Leaves deeply pinnately divided into 3-7 divisions; divisions linear-oblong, coarsely serrate, more than 3 times longer than wide. Ligules of flowers yellow, longer than the involucre. Seed and achene, cuneate-oblong, up the 2mm broad, the margins strigose-ciliate.      

Notes

Flowers mid June to early October

Wetland indicator: Obligate

One of the more attractive members of this genus.

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

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