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
   - burweed marsh elder, false ragweed

Type of: iva, marsh elder

• figwort family
• Fiji
• Fiji dollar
• Fiji Islands
• Fijian
• Fijis
• filaggrin
• filago
• Filago germanica
• filagree
• filament
• filamentlike
• filamentous
• filar
• filaree
• filaria
• filarial
• filariasis
• filariid
• Filariidae
• filature
• filbert
• filch
• file
• file allocation table