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This genus is accepted, and its native range is S. Siberia to Japan.
Amethystea caerulea

[LKGF]

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
Annual herb, slightly aromatic
Morphology Leaves
Leaves opposite, petiolate, deeply 3-lobed, serrate
Morphology Reproductive morphology Inflorescences
Inflorescence a lax, terminal paniculiform thyrse
Morphology Reproductive morphology Flowers
Flowers minute
Morphology Reproductive morphology Flowers Calyx
Calyx actinomorphic, accrescent, 5-lobed
Morphology Reproductive morphology Flowers Corolla
Corolla pale lavender, zygomorphic, 5-lobed, anterior lobe largest, concave
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 2 fertile, posterior pair reduced to staminodes, filaments arched, thecae divaricate, confluent at dehiscence
Morphology Reproductive morphology Flowers Pollen
Pollen with supratectal spinules
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary unlobed
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma lobes unequal
Morphology Reproductive morphology Flowers Disc
Disc absent
Morphology Reproductive morphology Fruits
Nutlets obovoid, reticulately ridged, glabrous, attachment-scar lateral, 0.7-0.8x as long as nutlet; endosperm present.
Note
2n = 20, 26. One species, Amethystea caerulea L.
Ecology
Widespread in open, disturbed habitats.
Distribution
In temperate Asia. Native to: Siberia, Russian Far East, Middle Asia, Western Asia, China, Mongolia, Eastern Asia

Native to:

Altay, Amur, Buryatiya, China North-Central, China South-Central, China Southeast, Chita, Inner Mongolia, Irkutsk, Japan, Kazakhstan, Khabarovsk, Kirgizstan, Korea, Krasnoyarsk, Manchuria, Mongolia, Primorye, Sakhalin, Tadzhikistan, Tibet, Tuva, Xinjiang, Yakutskiya

Introduced into:

East European Russia, West Siberia

Amethystea L. appears in other Kew resources:

First published in Sp. Pl.: 21 (1753)

Accepted by

  • Govaerts, R. (1995). World Checklist of Seed Plants 1(1, 2): 1-483, 1-529. MIM, Deurne.
  • Govaerts, R. (2003). World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew.

Literature

Lamiaceae Key Genus Fact Sheets

  • Amethystea L., Sp. Pl. 1: 21 (1753)
  • Amethystina Zinn, Cat. Pl. Hort. Gott.: 318 (1757).
  • Gen. Pl. ed. 5: 13 (1754).
  • Harley RM, Atkins S, Budantsev AL, Cantino PD, Conn BJ, Grayer R, Harley MM, de Kok RPJ, Krestovskaja T, Morales R, Paton AJ, Ryding O, and Upson T. 2004. Labiatae, in The Families and Genera of Vascular Plants (K. Kubitzki, ed. in chief) VI: 167-275. Sp

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. 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