Common Name: common ragweed, hayfever weed
Scientific Name: Ambrosia artemisiifolia L.
Family Name: Asteraceae (Compositae) - Aster or Sunflower Family

Identification Notes:

life cycle - annual, reproducing by seed

stems - upright, hairy, rough growth habit

leaves - highly dissected, opposite below, alternate above leaves

flowers - heads of green disc (tubulate) florets; male flowers in inverted receptacle, terminal racemes; female flowers axillary above male flowers, female flowers 1, female flowers 2

Images:

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