1. Perennial of southeastern United States having usually blue flowers
   - Short's aster

Type of: aster

• protoctist order
• Protoctista
• protogeometric
• protoheme
• protohemin
• protohippus
• protohistory
• protology
• protomammal
• protomartyr
• proton
• proton accelerator
• proton magnetic resonance
• protonotary
• protoplasm
• protoplasmic
• protoplasmic astrocyte
• protoplast
• protostar
• Prototheria
• prototherian
• prototypal
• prototype
• prototypic
• prototypical