Pycnanthemum tenuifolium


Pycnanthemum tenuifolium, the narrowleaf mountainmint, slender mountainmint, common horsemint or Virginia thyme, is a plant in the mint family, Lamiaceae. It is native to eastern North America.
Pycnanthemum tenuifolium is an herbaceous plant with narrow, opposite, simple leaves, on wiry, green stems. The flowers are white, borne in summer. Unlike most plants in the genus, the foliage has a very faint mint fragrance.