Slender Mountain Mint (Pycnanthemum tenuifolium)

This stiff, erect, compact, clump-forming mint has narrow leaves subtending the flower clusters. The minty-smelling plants are 20-30 in. tall and have terminal flower clusters composed of numerous, small, two-lipped corollas varying from whitish to lavender, with purple spots. Grows in upland prairies; dry, rocky, open woods; low, wet areas. Has silvery foliage and long blooming period.