Great blue lobelia (Lobelia siphilitica)

Bellflower family (Campanulaceae) | Wildflowers and Herbs plant group
21 reports

A short-lived perennial wildflower that grows up to three feet tall. It blooms purple-blue flowers in July to September.

Identification Hints

Great blue lobelia prefers a moist or wet soil and is widespread east of the Rocky Mountains. 

Did You Know?

Great blue lobelia is beneficial to native bees. However, to humans, all parts of the plant are toxic if eaten in large quantities.

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