Agastache foeniculum (Pursh) Kuntz - Blue Giant Hyssop


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Agastache foeniculum - (image 1 of 3)



Family: Lamiaceae


Dry upland woods and prairies.




WI to northern IA and Manitoba, south to CO and Alberta; introduced further east.


Herbaceous perennial; stems erect, to 1 m, simple or branched above; leaves ovate to rhombic ovate or deltoid ovate, to 9 cm, coarsely serrate, broadly obtuse to truncate at the base, whitish on the underside with very fine close pubescence; petioles rarely to 1.5 cm; spikes cylindric, to 15 cm, 2-2.5 diameter, often interrupted at the base; bracts broadly ovate, acuminate; calyx puberulent at anthesis, 5-7 mm, the lobes blue at least distally, lance-triangular, 1.5-2 mm; corolla blue-purple, nearly 1 cm.


Flowers July to August

Wetland Indicator: NA

The leaves smell and taste of licorice.


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