Agastache Clayton ex Gronov.

First published in Fl. Virgin., ed. 2: 88 (1762)
This genus is accepted
The native range of this genus is Central & E. Asia, N. America.

Descriptions

Harley, R.M. et al. (2004). Labiatae, in The Families and Genera of Vascular Plants (K. Kubitzki, ed. in chief) VI: 167-275. Springer-Verlag, Berlin, Heidelberg, New York.

Morphology General Habit
Perennial herbs, aromatic
Morphology Leaves
Leaves simple, dentate
Morphology Reproductive morphology Inflorescences
Inflorescence thyrsoid, terminal, spike-like or panicle-like, cymes pedunculate or sessile
Morphology Reproductive morphology Inflorescences Bracts
Bracts reduced, lower often leaf-like
Morphology Reproductive morphology Inflorescences Bracteoles
Bracteoles subulate
Morphology Reproductive morphology Flowers Calyx
Calyx tubular or campanulate, straight, indistinctly 2-lipped, 5-lobed (3/2), lobes equal, throat open
Morphology Reproductive morphology Flowers Corolla
Corolla strongly 2-lipped, 5-lobed (2/3), pink, blue to violet or white, posterior lip straight, anterior lip with median lobe widest, spreading, entire or undulate, lateral lobes straight, tube gradually dilating to throat
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens much exserted or included, filaments parallel or posterior pair antrorsely bent, thecae parallel
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma lobes equal, spreading
Morphology Reproductive morphology Flowers Disc
Disc 4-lobed
Morphology Reproductive morphology Fruits
Nutlets ellipsoid to obovoid, smooth with apex hairy, areole oblong or orbicular.
Note
2n = 18. About 22 species. Sectional treatment after Sanders (1987).   Sect. Agastache: Stamens long-exserted, filaments of posterior stamens antrorsely bent, and crossing anterior pair.  Seven species in U.S.A. and Canada, one species in Asia.   Sect. Brittonastrum (Briq.) Lint &
Ecology
Mountains or deserts
Distribution
Native to: Russian Far East, China, Eastern Asia, Subarctic America, Western and Eastern Southern Canada, U.S.A., Mexico. Introduced to Indo-China
[LKGF]

Sources

  • Herbarium Catalogue Specimens

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Lamiaceae Key Genus Fact Sheets

    • Nina Davies, Gemma Bramley and Don Kirkup, Royal Botanic Gardens, Kew
    • http://creativecommons.org/licenses/by/3.0