Related Clues:

• Light switch of a sort
• Eye part that contracts
• Less bright
• You can see right through it
• Crocus cousin
• You look through it
• Membrane of the eye
• Showy perennial
• Purple perennial
• Spring bulb
• It's usually blue, green or brown
• Georgia O'Keeffe subject
• Pupil's milieu
• Where the pupil sits?
• Perennial flower