A tall, stiffly erect herb, perennial by short offsets at the base; stem I to 3 feet high, stout, leafy, simple, slightly hairy, bearing a long, manyflowered raceme of bright-blue flowers, each flower subtended by a leafy bract. Lea Yes smooth or sparingly pubescent, 2 to 6 inches long, one-half to 2 inches wide, long pointed at the apex, narrowed at the base, the lower leaves petioled, the upper sessile, irregularly toothed and alternate. Calyx hairy, with five long, narrow, pointed lobes with large appendages between the lobes. Corolla about 1 inch long, blue fading to pale blue, marked with white on the lobes of the lower lip; upper lip of the corolla two-lobed and erect, the lobes nearly as large as the three lobes of the lower lip. The flowers are rarely entirely white.
In moist or wet soil, along streams, in wet thickets and marshes, Maine to Ontario and South Dakota, south to Georgia, Louisiana, Kansas and Colorado. Flowering from July to October.
Memoir 15 N. Y. State Museum
Great Or Blue Lobelia - Lobelia syphilitica