1. Mat-forming perennial found in cold springs of the eastern United States
   - American watercress, Cardamine rotundifolia

Type of: watercress

• safety lamp
• safety lock
• safety margin
• safety match
• safety net
• safety nut
• safety pin
• safety rail
• safety razor
• safety squeeze
• safety squeeze play
• safety valve
• safety zone
• safety-deposit
• safety-related
• safflower
• safflower oil
• safflower seed
• saffranine
• saffron
• saffron crocus
• safranin
• safranine
• sag
• sag down