1. Common perennial of eastern North America having flowers with usually violet-purple rays
   - robin's plantain

Type of: fleabane

• 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
• infuriated
• infuriating
• infuriatingly
• infuriation