an Entity references as follows:
Symphyotrichum hallii (formerly Aster hallii) is a species of flowering plant in the family Asteraceae endemic to western Oregon and Washington states. Commonly known as Hall's aster, it is a perennial, herbaceous plant with a long rhizome that creates colonies of itself. It grows about 30–60 centimeters (1–2 feet) tall, and has white (sometimes pale violet) rays that open July–August.