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Parthenium

1. Leaves deeply pinnatifid or bipinnatifid; plants annual; pappus of 2 scales.

P. hysterophorus

1. Leaves merely toothed or crenate; plants perennial; pappus of 2-3 weak awns.

P. integrifolium

All species found in Parthenium

Citation:
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. March 16, 2025
https://mifloradev.lsa.umich.edu/flora-demo/#/genus/Parthenium