Agastache nepetoides (L.) Kuntz - Yellow Giant Hyssop


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Agastache nepetoides - (image 1 of 5)



Family: Lamiaceae


Open woods.




VT to southern Ontario, MN, and southeast SD, south to GA and OK.


Herbaceous perennial; stems erect, to 1.5 m, branched above; leaves thin, green, ovate or lance-ovate, to 15 cm, reduced upwards, coarsely serrate, rounded or subcordate at the base, finely hairy beneath; petioles of the larger leaves to 6 cm, shorter on the leave above; spike subcylindric, to 20 cm long and 1-1.5 cm in diameter, occasionally interrupted at the base; bracts broadly ovate, acuminate; calyx at anthesis glabrous, 6 mm; calyx lobes lance-ovate, 1-1.5 mm, with convex margins, obtuse or subacute; corolla greenish-yellow.


Flowers August to September

Wetland Indicator: NA

The leaves superficially resemble those of catnip (Nepeta cataria) but are thinner and less fuzzy.


Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Ed.
The New York Botanical Garden. Bronx, NY




Michael Hough 2018