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Ambrosia artemisiifolia, Ambrosia absynthifolia, Annual Ragweed, Bitterweed, Blackweed, Carrot Weed, Hay Fever Weed, Roman Wormwood, Stammerwort, Stickweed, Tassel Weed, American Wormwood

Scientific name:  Ambrosia artemisiifolia L.
Synonym name:  Ambrosia absynthifolia Michx
Common name:  Annual Ragweed, Bitterweed, Blackweed, Carrot Weed, Hay Fever Weed, Roman Wormwood, Stammerwort, Stickweed, Tassel Weed, American Wormwood
Family:  Asteraceae / Compositae, Sunflower family

Ambrosia artemisiifolia, Ambrosia absynthifolia, Common Ragweed, Annual Ragweed, Bitterweed, Blackweed, Carrot Weed, Hay Fever Weed, Roman Wormwood

Life form:  Annual herb
Stems:  1-5'(30-150) high; coarse, hairy-stemmed
Leaves:  Deeply pinnatifid, broadly lanceolate (in outline)
Inflorescence:  Inconspicuous flowers in elongated clusters of separate male and female flower heads
Flowers:  Male heads of yellow-green disk flowers, stalked, upside down, atop plant and side branches; female heads of green disk flowers, stalkless, solitairy or in smaller clusters in axils at base of male clusters
Fruits / pods:  Achene
Flowering Period:  July, August, September, October
Habitat:  Cultivated fields, waste places, roadsides

Ambrosia artemisiifolia, Ambrosia absynthifolia, Common Ragweed, Annual Ragweed, Bitterweed, Blackweed, Carrot Weed, Hay Fever Weed, Roman Wormwood


Derivation of the botanical name:
Ambrosia, in ancient Greek mythology, ambrosia, ἀμβροσία, is sometimes the food, sometimes the drink, of the Greek gods (or demigods), often depicted as conferring ageless immortality upon whoever consumes it.In the Odyssey, we hear that ambrosia is brought to Zeus from beyond the Planktai by doves.
artemisiifolia, because the leaves were thought to bear a resemblance to the leaves of Artemisia, the true wormwoods.
  • The standard author abbreviation L. is used to indicate Carl Linnaeus (1707 – 1778), a Swedish botanist, physician, and zoologist, the father of modern taxonomy.
  • The standard author abbreviation Michx. is used to indicate André Michaux (1746 – 1802), a French botanist and explorer.

Ambrosia artemisiifolia, Ambrosia absynthifolia, Common Ragweed, Annual Ragweed, Bitterweed, Blackweed, Carrot Weed, Hay Fever Weed, Roman Wormwood


 Annual Ragweed, Bitterweed, Blackweed, Carrot Weed, Hay Fever Weed, Roman Wormwood, Stammerwort, Stickweed, Tassel Weed, American Wormwood


 
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