• WordNet 3.6
    • n ragweed any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma
    • n ragweed widespread European weed having yellow daisylike flowers; sometimes an obnoxious weed and toxic to cattle if consumed in quantity
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Webster's Revised Unabridged Dictionary
  • Interesting fact: One ragweed plant can release as many as a million grains of pollen in one day
    • n Ragweed răg"wēd` (Bot) A common American composite weed (Ambrosia artemisiæfolia) with finely divided leaves; hogweed.
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Century Dictionary and Cyclopedia
    • n ragweed Any plant of the composite genus Ambrosia; especially, the common North American species A. trifida, the great ragweed or horse-cane, and A. artemisiæfolia, the Roman wormwood or hogweed. Both are sometimes called bitterweed. The former is commonly found on river-banks, has three-lobed leaves, and is sometimes 12 feet high. The latter, a much-branching plant from 1 to 3 feet high, with dissected leaves, grows everywhere in waste places, along roads, etc., and is troublesome in fields. Its pollen is regarded as a cause of hay-fever. The plants of this genus are monœcious, the flowers of the two sexes borne in separate heads, the female heads producing a single flower with the ovoid involucre closed over it. The flowers are greenish and inconspicuous. See Ambrosia, 2.
    • n ragweed The ragwort or St.-James-wort, Senecio Jacobæa.
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Chambers's Twentieth Century Dictionary
    • Ragweed any plant of the composite genus Ambrosia
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Chambers's Twentieth Century Dictionary
Ice. rögg, shagginess.


In literature:

The ragweed grew everywhere it pleased, affording grand cover for the quail.
"The Killer" by Stewart Edward White
She scatters them with lavish hand from ragweed, thistle or oak.
"Trees, Fruits and Flowers of Minnesota, 1916" by Various
The fields were shaggy with ragweed and dead whitetop and yellow sedge.
"Dwellers in the Hills" by Melville Davisson Post
Millie had an awful time telling marigold from ragweed last summer.
"The Jonathan Papers" by Elisabeth Woodbridge Morris
By 1954, however, the sunflower was nearly eliminated, and the giant ragweed, though still abundant, was much stunted.
"The Forest Habitat of the University of Kansas Natural History Reservation" by Henry S. Fitch
Many grasslands have a stand of dandelions; sow thistle, wild lettuce, and ragweed were also common in some grasslands.
"Natural History of the Prairie Vole (Mammalian Genus Microtus)" by E. W. Jameson
Wild lettuce, mullein, dandelion, ragweed and thistles are special favourites.
"Birds Every Child Should Know" by Neltje Blanchan
Forbs most commonly found in the piles of cuttings were the leaves of the giant ragweed (younger plants only) and dandelion.
"A Population Study of the Prairie Vole (Microtus ochrogaster) in Northeastern Kansas" by Edwin P. Martin
The white-throated sparrow, a large and very pretty bird, eats the seeds of smartweed and ragweed.
"The Children's Book of Birds" by Olive Thorne Miller

In poetry:

Windflowers herald the Maytide,
Rendering worth for worth;
Ragweeds gladden the wayside,
Biting the dugs of the Earth;
"The Poet's Town" by John Gneisenau Neihardt
"Gold of butterflies, gold of bees,
Gold of ragweeds and golden seas;
Gold on gorses for kissing's sake,
Which of these will you touch and take,
Moirín, Moirín?"
"Gold-Heart" by Nora Jane Hopper Chesson

In news:

Beyond ragweed, allergenic combinations .
Brian Thomas, Tracy Strome and PJ Bevelacqua, characters in the Play "The Ragweed Blues.".
Cross Canadian Ragweed , Facebook.
Glyphosate-resistant giant ragweed in Nebraska.
Ragweed season now 16 days longer.
Giant Ragweed Latest Concern For Farmers.
When it comes to weed pests, glyphosate-resistant waterhemp tops the list, but resistant giant ragweed may be the challenger, according to a University of Missouri Extension weed scientist.
Cross Canadian Ragweed cancels Oklahoma City Family Jam, still playing Sunday's Music and Mayhem in Eufaula.
Ragweed , Weekend Rain, Tropics.
Plentiful rains, warm temperatures could make for major ragweed problems in the Northeast.
Of course, Canada was the front man for years for Cross Canadian Ragweed.
With Cross Canadian Ragweed on a break, Cody Canada is free to pursue music paying tribute to the sounds that inspired him.
The newly formed band seems to be impressing old ragweed and new departed fans alike.
When I heard the news that Cross Canadian Ragweed was going to "take a break" from the music scene, I was somewhat shocked and disappointed.
Cody Canada talks about The Departed, Cross Canadian Ragweed, the Wormy Dog Saloon's 20th anniversary.