blue giant hyssop, fragrant giant hyssop, lavender giant hyssop
[Agastache anethiodora (Nutt.) Britton, more...]
Etymology: Agastache: from agan, "very much," and stachys, "an ear of corn or wheat," having many spikes
Plants: erect, perennial, 1'-3' tall forb with anise or fennel smell; stems square, sometimes branching above
Leaves: opposite, whitish beneath, coarsely toothed, largest to 4 1/2 "
Flowers: blue, 5-parted, 1/3" long, slightly irregular, hairy; inflorescence a dense whorl of flowers forming cylindrical spikes up to 8" x 1", often interrupted near the base; blooms July-Sept.
Fruits: 1-seeded nutlet
Habitat: full to partial sun; dry to moderate moisture; woods, prairies, uplands; in sandy, loamy soil
Conservation Status: Native
Floristic Rating: Coefficient of Conservatism = 6 USDA Plants Database: Federal Distribution and detailed information including photos Illinois Wildflowers: Wonderful photographs; detailed descriptions; color and leaf arrangement key Southwest School of Botanical Medicine: Britton & Brown Illustrated Flora - 2nd Edition (1913) "An Illustrated Flora of the Northern United States and Canada"