[2] They typically bloom in late spring or early summer with branched panicles of white to purple flowers.

[1] They produce inflated tubular flowers 2- 3.5 cm long with two spreading lips, the lower much longer than the upper.

[3] The leaves are serrate, glabrous, and generally have a lanceolate shape with cordate bases.

[3] Primarily found in the Southern Appalachians of the Carolinas, Georgia, and Tennessee, the species extends across the Ridge and Valley south into Alabama.

[4] They are generally found within or around rock outcrops, glades, barrens, bluffs, and rocky slopes, preferring circumneutral soils lacking in fertility.