12 in stock
1 Gallon Pot. Native. 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). Late summer bloom period.