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This genus is accepted, and its native range is S. Africa.
A specimen from Kew's Herbarium

[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
Semi-succulent subshrubs or herbs, aromatic
Morphology Leaves
Leaves simple
Morphology Reproductive morphology Inflorescences
Inflorescence thyrsoid, condensed or lax, with cymes sessile, 1-flowered
Morphology Reproductive morphology Inflorescences Bracts
Bracts persistent, sometimes caducous, leaf-like or smaller
Morphology Reproductive morphology Flowers Calyx
Calyx funnel-shaped or shortly tubular, straight, sometimes slightly curved, 2-lipped or weakly so, 5-lobed (1/4), lobes unequal, posterior lip lanceolate to elliptic, decurrent or not, lateral lobes lanceolate sometimes with a slight shoulder, anterior l
Morphology Reproductive morphology Flowers Corolla
Corolla strongly 2-lipped, 5- or 4-lobed (4-3/1), white to lilac, posterior lip with median lobes erect, emarginate or two-lobed, lateral lobes linear, spreading, deflexed, close to anterior lip, anterior lip deflexed, cucullate; tube narrow, cylindrical,
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 4, free, exserted
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma-lobes subulate or linear
Morphology Reproductive morphology Flowers Disc
Disc 4-lobed with anterior lobe larger, sometimes exceeding ovaries
Morphology Reproductive morphology Fruits
Nutlets, ovoid, glabrous, mucilaginous or not.
Note
2n = 28.  Four species
Ecology
In rock outcrops
Distribution
Southern Africa.

Native to:

KwaZulu-Natal, Northern Provinces, Swaziland

Thorncroftia N.E.Br. appears in other Kew resources:

First published in Bull. Misc. Inform. Kew 1912: 281 (1912)

Accepted by

  • 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

  • Codd, Bothalia 7: 429 (1961), rev.
  • 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
  • Thorncroftia N.E.Br., Kew. Bull. Misc. Inf. 1912: 281 (1912)

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