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Helianthus grosseserratus - (image 1 of 5)

Taxonomy

Family: Asteraceae

Habitat

Common in degraded prairies, moist meadows.

Associates

In prairies with Aster ericoides, Aster novae-angliae, Cirsium discolor, Equistium arvernse, Eryngium yuccifolium, Fragaria virginiana, Monarda fistulosa, Ratibida pinnata, Rudbeckia hirta, Silphium integrifolium, Silphium terebinthinaceum, Solidago canadensis, Solidago rigida.

Distribution

Most of the eastern half of the US except VT, RI, SC, AL, and FL. Also found in WA (which is pretty isolated?)

Morphology

Tall herbaceous perennial. Basal leaves absent; cauline leaves well-developed, alternate, firm, serrate, lower surfaces pale and densely pubescent. Stems glabrous, often glaucous, sometimes sparsely hirtellous within or just below the inflorescence. Floral heads with both ray and disk flowers; disk corollas yellow, receptacle convex.

Notes

Flowers early July to mid October

Wetland indicator: Facultative wetland-

Quite common in the Chicago area and presumably elsewhere. Often the dominant vegetation along steams, fencerows, roadsides, and ditches.

Bibliography

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

USDA, NRCS. 2002.
The PLANTS Database, Version 3.5 (http://plants.usda.gov).
National Plant Data Center, Baton Rouge, LA 70874-4490 USA.

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