• noun
• synonym
• antonym

• common ragweed (noun)
  1. annual weed with finely divided foliage and spikes of green flowers; common in North America; introduced elsewhere accidentally
• false ragweed (noun)
  1. tall annual marsh elder common in moist rich soil in central North America that can cause contact dermatitis; produces much pollen that is a major cause of hay fever
• great ragweed (noun)
  1. a coarse annual with some leaves deeply and palmately three-cleft or five-cleft
• perennial ragweed (noun)
  1. coarse perennial ragweed with creeping roots of dry barren lands of southwestern United States and Mexico
• ragweed pollen (noun)
  1. pollen of the ragweed plant is a common allergen
• western ragweed (noun)
  1. coarse perennial ragweed with creeping roots of dry barren lands of southwestern United States and Mexico
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