Ragweed, Ambrosia artemisiifolia, is very commonly found in waste area spaces such as edges of roads. There has at least 15 species. Every plant has male and female flowers on the plant. The male is the pollen producing flower that is on the tip of the stem. The female flowers form at leaf bases or forks of upper stems.
|Ragweed: Photo courtesy of Lou Ziska, ARS|
A quick way to differentiate between Goldenrod and Ragweed are the leaves.
Goldenrod flower and leaves
|Photo courtesy of Patrick J. Alexander|