1. Smallest flowering plants known; of the Americas
   - common wolffia

Type of: watermeal

• horse sense
• horse thistle
• horse tick
• horse trader
• horse trading
• horse wrangler
• 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