Skip to main content

For Your Garden - June 2016

Native plants provide beauty as well as food and shelter for wildlife. Native species are adapted to the Illinois climate. They require little or no watering and are resistant to drought, insects and most diseases. Because they are perennials, you can welcome their presence year after year.

great blue lobelia  (Lobelia siphilitica)

Great blue lobelia grows in wet areas throughout Illinois. It blooms from July through October, producing spikes of blue-to-purple flowers on a stalk from the top of the plant. The flowers have two upper lobes and three lower lobes. The lower lobes have stripes of white. This plant grows one to three feet in height. This member of the bluebell family has leaves arranged alternately along the stem. The leaf margin is toothed. Usually only one stem is present.

Classification and taxonomy are based on Mohlenbrock, Robert H. 2014. Vascular flora of Illinois: A field guide. Fourth edition. Southern Illinois University Press, Carbondale. 536 pp.

Illinois Range

Native Plant Information

For more information about Illinois native plants, visit our Native Habitat Descriptions, Requirements, and Plant Lists page. The following publications are available from the IDNR on our publications page.


​Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Campanulales
Family: Campanulaceae

Illinois Status: common, native