1. Perennial of western North America having white flowers
   - white prairie aster

Type of: aster

• knotted marjoram
• knottiness
• knotty
• knotty pine
• knotweed
• knout
• know
• know apart
• know backwards
• know by heart
• know nothing
• know the score
• know what's going on
• know what's what
• know-all
• know-how
• know-it-all
• Know-Nothing Party
• knowable
• knower
• knoweth
• knowing
• knowingly
• knowingness
• knowledgable