Lobelia siphilitica - Great Lobelia
Lobelia siphilitica, commonly called great lobelia or blue cardinal flower, is a clump-forming perennial which features light to 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. Flowers arise from the upper leaf axils forming a dense terminal raceme atop stiff, unbranched, leafy stalks typically rising 2-3' tall. Finely-toothed, lance-shaped, light green leaves (to 5" long). Provides late summer bloom to the perennial border, wild garden, native plant garden, woodland garden or naturalized planting. Also effective near ponds or streams. Excellent addition to the hummingbird garden.