Agastache scrophulariifolia (Purple Giant Hyssop)
|Also known as:|
|Habitat:||part shade, sun; woods|
|Bloom season:||July - August|
|Plant height:||3 to 6 feet|
|Wetland Indicator Status:||none|
|MN county distribution (click map to enlarge):|
|National distribution (click map to enlarge):|
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Flower spike 1 to 6 inches long of ¼ inch long tubular flowers, each with 4 long stamens. Color ranges from lavender to pale pink and occasionally white. The lower lip of the flower tube has 3 lobes; the center one is widest. One plant usually has several spikes. Not all flowers are open at the same time.
Leaves and stem:
Leaves are up to 4 inches long and 2 inches wide, with a rounded base, pointed tip and coarsely toothed edges. The leaf stem is covered in short hairs. Like all members of the Mint family, the main stem is square; it has scattered short hairs along the ridges as well.
Notes:Purple Giant Hyssop can be distinguished from Blue Giant Hyssop (A. foeniculum) by the leaves and the cup-like whorl of sepals (calyx) holding the flower. Purple Giant Hyssop has a green calyx, Blue Giant Hyssop is blue-violet, and the underside of Blue Giant Hyssop leaves is whitish where Purple Giant Hyssop is green.
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Photos taken in Blaine, Anoka County and Wild River State Park, Center City, MN July-August 2007 and 2009. Other photos courtesy Peter M. Dziuk taken in Hennepin County
Have you seen this plant in Minnesota, or have any other comments about it?