Parthenium integrifolium L.
Common Name: AMERICAN FEVERFEW, WILD QUININE
Synonym: Parthenium hispidum
Coefficient of Conservatism: *
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Ad P-Forb

Including P. hispidum of Michigan Flora

Native in prairie remnants in adjacent Indiana (and beyond), and should be sought in southwestern Michigan. Not collected until 1936 (Kalamazoo Co.), our occurrences represent either waifs or escapes from cultivation into fields, along railways, and other disturbed open areas, or persisting from so called prairie plantings (as in Lenawee Co.) Plants with the upper leaves clearly auriculate-clasping and larger heads have been segregated as var. hispidum (Raf.) Mears or P. hispidum Raf., but are now considered part of the variation of P. integrifolium.

Locations

Alger County
Kalamazoo County
Keweenaw County
Lenawee County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 18, 2017. http://www.michiganflora.net/species.aspx?id=419.