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Ragweed
Ambrosia artemisiifolia
Photo by Dr. John Meade, weed scientist emeritus
Rutgers Cooperative Extension
This is the worst offender for those people allergic to pollen. This plant releases copious amounts of pollen which has a high rating for causing "hayfever." By the time of pollen release, it looks very ratty.
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Rutgers New Jersey Agricultural Experiment Station
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New Jersey Agricultural Experiment Station · 88 Lipman Drive · New Brunswick, NJ 08901-8525
