Common Ragweed
Common Ragweed
Ambrosia artemisiifolia
Aster or Composite Family - Asteraceae
An upright (1 to 4 feet tall), much branched herb with hairy stems. Leaves much dissected, alternate and pale green. Stems terminate in elongated clusters (2 to 6 inches long) of what are mainly male flowers with single or small groups of greenish female flowers at the base of the male clusters. Male flowerheads as groups of yellow-green disk flowers (prominent pollen-bearing yellow stamens), which are stalked and dependent.
(Photographed - late August)
  Pathology Images Inc. 2000 to 2002