common yarrow

Here is Achillea millefolium of the family asteraceae:

This is another example of a highly successful invasive species.  Though A. millefolium can claim native status in parts of the United States, it has found its way throughout the continent.  This plant appears to have a colorful heritage, illuminated here, that includes extensive use as a medicinal herb, beer brewing and Neanderthal burial rites. 

The photo above was taken in June of 2009 along the I-57 corridor near an on-ramp.