Parthenium integrifolium L.
Family: Asteraceae
American feverfew,  more...
[Parthenium integrifolium var. hispidum L.,  more]
Parthenium integrifolium image
Derek Anderson  
Etymology: Parthenium: Greek parthenos for "virgin" referring to infertile disk flowers
Plants: robust, erect, perennial, 20"-40" tall, aromatic forb usually with no branches
Leaves: alternate, large, toothed; lower on long stalks, upper smaller and stalkless to clasping
Flowers: head white, 1/4" wide with a few rays and a prominent disk; inflorescence of many heads in dense, flat-topped clusters; blooms July-Sept.
Fruits: black, dry seed without a fluffy pappus
Habitat: full sun; dry to moist; prairies, woods; in sandy, loamy soil
Conservation Status: Threatened
Parthenium integrifolium image
Merel R. Black  
Parthenium integrifolium image
Mark Mittelstadt  
Parthenium integrifolium image
Merel R. Black  
Parthenium integrifolium image
Theodore S. Cochrane  
Parthenium integrifolium image
Parthenium integrifolium image
Kitty Kohout  
Parthenium integrifolium image
Aaron_Carlson  
Parthenium integrifolium image
Aaron_Carlson  
Parthenium integrifolium image
Aaron Carlson  
Parthenium integrifolium image
Derek Anderson  
Parthenium integrifolium image
Merel R. Black  
Parthenium integrifolium image
Parthenium integrifolium image
Theodore S. Cochrane  
Parthenium integrifolium image
Aaron_Carlson  
Parthenium integrifolium image
Aaron_Carlson  
Parthenium integrifolium image
Derek Anderson  
Parthenium integrifolium image
Derek Anderson  
Parthenium integrifolium image
Christopher Noll  
Parthenium integrifolium image
Parthenium integrifolium image
John M. Schoeneker  
Parthenium integrifolium image
Parthenium integrifolium image
Theodore S. Cochrane  
Parthenium integrifolium image
Aaron_Carlson  
Parthenium integrifolium image
Derek Anderson  
Parthenium integrifolium image
Derek Anderson  
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
Parthenium integrifolium image
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