1. Coarse perennial ragweed with creeping roots of dry barren lands of southwestern United States and Mexico
   - western ragweed, perennial ragweed

Type of: ambrosia, bitterweed, ragweed

• infrangible
• infraorbital artery
• infrared
• infrared emission
• infrared frequency
• infrared lamp
• infrared light
• infrared radiation
• infrared ray
• infrared spectrum
• infrared therapy
• infrasonic
• infrasound
• infrastructure
• infrequency
• infrequent
• infrequently
• infrigidation
• infringe
• infringement
• infringement of copyright
• infructescence
• infundibuliform
• infundibulum
• infuriate