Mentha longifolia subsp. longifolia

From Flora of Indiana (1940) by Charles C. Deam

I found this mint in 1923 in moist soil along a recently graded roadside 3 miles southwest of Packerton, in Kosciusko County, where it formed a complete stand on both sides of the road for about 200 feet. I first found it in 1916 in sandy soil along the roadside north of Wolf Lake in Noble County. In 1922 and 1938, I revisited this place and the plant still persisted although the owner of the land had tried to exterminate it. In 1922, I found a colony about 2 rods long along the roadside in section 13, about 4 miles north of Modoc, in Randolph County.

.……

Indiana Coefficient of Conservatism: C = null, non-native

Wetland Indicator Status: N/A