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This genus is accepted, and its native range is Brazil to Argentina.
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
Subshrubs or perennial herbs, stems erect, virgate, internodes elongate, strongly 4-angled
Morphology Leaves
Leaves narrowly linear to linear-lanceolate, distant and sometimes reduced
Morphology Reproductive morphology Inflorescences
Inflorescences of few-flowered cymes, sessile or shortly pedunculate in axils of bracts, forming terminal, spiciform, interrupted or congested thyrse
Morphology Reproductive morphology Inflorescences Bracts
Bracts inconspicuous
Morphology Reproductive morphology Inflorescences Bracteoles
Bracteoles inconspicuous
Morphology Reproductive morphology Flowers Calyx
Calyx elongate, narrowly cylindrical, rarely shorter, narrowly infundibuliform, weakly 2-lipped, 5-lobed (3/2), lobes usually subequal, shorter than tube (except in r. strictus ), triangular to subulate, tube 13-14-nerved, nerves prominent, throat densely
Morphology Reproductive morphology Flowers Corolla
Corolla white, cream, lavender or red, 2-lipped, 5-lobed (2/3), lips ± subequal, or posterior lip longer, both usually shorter than tube, erect or anterior lip sometimes spreading, tube usually long-exserted from calyx, slightly curved, widening gradually
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 2 (posterior pair absent), filaments slightly arcuate, ascending, rarely slightly exserted from corolla, thecae equal, divaricate, or unequal, divergent, distinct, connective well-developed
Morphology Reproductive morphology Flowers Disc
Disc symmetrical, ± 4-lobed
Morphology Reproductive morphology Flowers Gynoecium Style
Style glabrous
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma-lobes unequal, posterior shorter
Morphology Reproductive morphology Fruits
Nutlets ovoid-oblong, smooth, not mucilaginous when wetted.
Note
Seven species
Distribution
Central and southern Brazil, Paraguay and Northern Argentina.
Ecology
Savannas and other open areas.

Native to:

Argentina Northeast, Brazil South, Brazil Southeast, Brazil West-Central, Paraguay, Uruguay

Rhabdocaulon (Benth.) Epling appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Souza, V.C. [5120], Brazil K001225930

First published in Repert. Spec. Nov. Regni Veg. Beih. 85: 134 (1936)

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

  • 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
  • Keithia Benth., Labiat. Gen. Spec.: 409 (1834), nom. illeg., non Spreng. (1822).
  • Keithia sect. Rhabdocaulon Benth. (1834).
  • Rhabdocaulon (Benth.) Epling, Rep. Spec. Nov. Beih. 85: 134-137 (1936), rev., Rep. Spec. Nov. Beih. 115: 8 (1939).

Herbarium Catalogue Specimens
Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

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