Inula helenium L.
Coefficient of Conservatism: *
Coefficient of Wetness: 3
Wetness Index: FACU
Physiognomy: Ad P-Forb

Inula helenium Ann Arbor Natural Area Preservation

Roadsides, fields, trails and clearings in forests; occurs in both dry and wet ground. Apparently native to central Eurasia, but widely spread as an escape from cultivation, as it is both ornamental and medicinal. First collected in Washtenaw Co. in 1861.

This is a robust, large-headed perennial, up to 2 m tall. The massive root has long been revered for its medicinal properties, and the enormous leaves may at first glance be mistaken for those of Silphium terebinthinaceum.


Alcona County
Allegan County
Antrim County
Benzie County
Berrien County
Branch County
Calhoun County
Charlevoix County
Cheboygan County
Chippewa County
Eaton County
Genesee County
Gratiot County
Ingham County
Ionia County
Isabella County
Kalamazoo County
Kent County
Lapeer County
Lenawee County
Macomb County
Mecosta County
Menominee County
Monroe County
Newaygo County
Oakland County
Saginaw County
Sanilac County
Shiawassee County
St. Clair County
Washtenaw County
Wayne County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. October 23, 2021.