1. North American perennial with apparently whorled leaves and showy white purple-tinged flowers
   - whorled aster

Type of: aster

• horse's foot
• horse-and-buggy
• horse-cart
• horse-chestnut family
• horse-drawn
• horse-drawn vehicle
• horse-pistol
• horse-race
• horse-trade
• horse-trail
• horseback
• horseback rider
• horseback riding
• horsebean
• horsebox
• horsecar
• horsecloth
• horsefish
• horseflesh
• horsefly
• horsefly weed
• horsehair
• horsehair lichen
• horsehair wig
• horsehead