Helianthus occidentalis - (image 1 of 4)
Taxonomy
Family: Asteraceae
Habitat
Sand prairies, dry hill prairies.
Associates
.
Distribution
Morphology
Herbaceous perennial. Basal leaves conspicuous at flowering time; stems leaves fewer than 6 pairs, the cauline ones strongly reduced upwards. Floral heads with both ray and disk flowers; rays yellow; disk corollas yellow or brownish-yellow; phyllaries acuminate.
Notes
Flowers mid July to early October
Wetland indicator: Facultative upland-
The common sunflower in open sand near Lake Michigan.
Bibliography
Swink, F. and G. Wilhelm. 1994. Plants of the Chicago Region.
Indiana Academy of Science. The Morton Arboretum. Lisle, Illinois.
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Michael Hough © 2005 |