Agastache scrophulariifolia (Willd.) Kuntze
Family: Lamiaceae
Purple Giant-Hyssop
[Agastache scrophulariifolia var. mollis (Fernald) A. Heller,  more]
Agastache scrophulariifolia image
Much like no. 1 [Agastache nepetoides (L.) Kuntze]; lvs glabrous to villous beneath; spikes cylindric or tapering, to 15 cm, 1.5-2 cm thick (including the cors); bracts round- ovate, caudate-acuminate, often projecting; cal 7-9 mm at anthesis, the lobes 2-2.5 mm, lance-triangular, with straight or concave sides, sharply acute or acuminate; cor purplish. Upland woods; Vt. and N.Y. to Minn. and e. S.D., s. to N.C. and e. Kans. Aug., Sept.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

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From Flora of Indiana (1940) by Charles C. Deam
A rare plant and found more often in the northern part of the state. It is generally found in somewhat moist and sandy soil in dry, open woods and along roadsides. The flowers vary greatly in color. They are usually purplish but sometimes nearly white with a tinge of purple or pink.