1. Violet-flowered perennial aster of central United States having solitary heads
   - prairie aster

Type of: aster

• unpresidential
• unpressed
• unpretending
• unpretentious
• unpretentiously
• unpretentiousness
• unpreventable
• unpriestly
• unprincipled
• unprintable
• open-end wrench
• open-ended
• open-eyed
• open-face sandwich
• open-faced
• open-heart surgery
• open-hearth
• open-hearth furnace
• open-hearth process
• open-minded
• open-mindedly
• open-mindedness
• open-plan
• open-source
• openbill