Agastache nepetoides (Linnaeus) Kuntze. Common name: Yellow Giant-hyssop. Phenology: Jul-Sep; Sep-Oct. Habitat: Woodlands and forests, generally over calcareous or mafic rocks. Distribution: VT west to MN, south to nw. GA and OK.
Origin/Endemic status: Native
Synonymy ⓘ: = Ar, C, F, G, GrPl, Il, K4, Mi, Mo3, NE, NY, Pa, RAB, S, Tat, Tn, Va, W, Lint & Epling (1945). Basionym: Hyssopus nepetoides L. 1753
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Wetland Indicator Status:
- Atlantic and Gulf Coastal Plain: FAC
- Eastern Mountains and Piedmont: FACU
- Great Plains: FACU
- Midwest: FACU
- Northcentral & Northeast: FACU
Heliophily ⓘ: 6
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Horticultural Information
Intro: Erect, rhizomatous perennial of woodlands and forests, generally over calcareous or mafic rocks.
Stems: Stems distinctly 4-angled, sometimes branched above, mostly smooth.
Leaves: Leaves opposite, petiolate, oval or lance-oval, 1-5 in. (reduced upward), coarsely toothed, finely hairy beneath.
Inforescence:
Flowers: Flowers densely packed, along with small green bracts, in terminal spikes to 4 in. long; flowers pale yellow, ⅜ in. long, bilaterally symmetric, the corolla tubular and divided into 2 lips: a nearly erect, 2-lobed upper lip and a 3-lobed lower lip (middle lobe largest). The green calyx also is tubular with 5 lobes; there are 4 long-protruding stamens.
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Height: 2-5 ft.
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description: Erect, rhizomatous perennial of woodlands and forests, generally over calcareous or mafic rocks.
stems: Stems distinctly 4-angled, sometimes branched above, mostly smooth.
leaves: Leaves opposite, petiolate, oval or lance-oval, 1-5 in. (reduced upward), coarsely toothed, finely hairy beneath.
inflorescence:
flowers: Flowers densely packed, along with small green bracts, in terminal spikes to 4 in. long; flowers pale yellow, ⅜ in. long, bilaterally symmetric, the corolla tubular and divided into 2 lips: a nearly erect, 2-lobed upper lip and a 3-lobed lower lip (middle lobe largest). The green calyx also is tubular with 5 lobes; there are 4 long-protruding stamens.
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