Common Name: Great blue lobelia, Blue cardinal flower. Scientific Name: Lobelia siphilitica. Family: Campanulaceae. Genus: Lobelia. Plant Type: Perennial. Flowering Time: July - September. Height: 24-36 in. (60-90 cm). Flower color: Blue, Blue-Violet, Dark blue

The Great Blue Lobelia (Lobelia siphilitica) is an herbaceous perennial in the Campanulaceae family. Native to Canada and United States. The flower are dark blue, tubular, 2-lipped flowers with the three lobes of the lower lip appearing more prominent than the two lobes of the upper lip.