Rough Blazing Star (Liatris aspera)

      

     

 

Rough Blazing Star (Liatris aspera)

Rough Blazing Star is a native perennial of Wisconsin’s dry prairies, sandy openings, and light‑filled savannas. It grows on a single upright stem, usually 16 to 48 inches tall, with narrow, lance‑shaped leaves that feel distinctly rough—an easy way to recognize the species. From midsummer into fall, the upper portion of the stem carries rounded flower heads about three‑quarters of an inch wide. Each head contains roughly 25 to 40 florets, most in bright pink to purple, though white forms do occur. The heads open from the top downward, giving the plant a slow, staggered bloom that lasts well into the fall migration period.

These button‑like clusters are an important nectar source for late‑season pollinators. Long‑tongued bees visit heavily, and butterflies such as Monarchs and Painted Ladies rely on the plant during their late‑summer movements. Hummingbirds occasionally stop at the flowers as well. Rough Blazing Star thrives in sandy or rocky soils, tolerates drought, and persists in places where competition is low and sunlight is strong. Its resilience and pollinator value make it a reliable choice for prairie restoration, sand‑prairie plantings, and dry pollinator gardens.

Sources:

USDA NRCS PLANTS Database – Liatris aspera

Flora of North America – Liatris aspera

Illinois Wildflowers – “Rough Blazing Star”

Lady Bird Johnson Wildflower Center – “Liatris aspera”

Missouri Botanical Garden Plant Finder – “Liatris aspera”

University of Wisconsin–Madison Herbarium (WIS) – Species Records for Liatris aspera

Minnesota Wildflowers – “Rough Blazing Star”

 (SF)