Ambrosia artemisiifolia

Common Name: 
common ragweed , hayfever weed
Scientific Name: 
Ambrosia artemisiifolia L.
Family Name: 
Asteraceae (Compositae) - Aster or Sunflower Family
Identification Notes
Life Cycle
native annual, reproducing by seed
Stems
upright, hairy, rough
Stems of Common Ragweed
Stems of Common Ragweed
Stems of Common Ragweed
Stems of Common Ragweed
Stems of Common Ragweed
Stems of Common Ragweed
Leaves
highly dissected, opposite below, alternate above
Leaves of Common Ragweed
Flowers
heads of green disc (tubulate) florets; male flowers in inverted receptacle, terminal racemes; female flowers axillary above
Flowers of Common Ragweed
Flowers of Common Ragweed
Flowers of Common Ragweed
Flowers of Common Ragweed