Color of corolla-lobes, purplish red or crimson. Tube of corolla longer than in the preceding, and flowers larger, in simple cymes on hairy pedicels. Calyx - tube also hairy, with linear teeth, the tube about the same length as the teeth. Leaves, opposite, sessile, ovate, blunt at apex, on the flowering stems. Besides the flowering stems, which stand erect, 4 to 8 inches high, there are sterile shoots, or runners, which creep along the ground bearing smooth, thick, evergreen, inversely ovate leaves, narrowed below into short petioles. May and June.
In damp woods, Pennsylvania to Georgia and westward. Found 4,500 feet high in Virginia.