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

[FTEA]

Lamiaceae (Labiatae), A.J. Paton, G. Bramley, O. Ryding, R.M. Polhill, Y.B. Harvey, M. Iwarsson, F. Willis, P.B. Phillipson, K. Balkwill, C.W. Lukhoba, D.F. Otieno, & R.M. Harley. Flora of Tropical East Africa. 2009

Morphology General Habit
Annual or perennial herbs, arborescent herbs or suffrutices with stems from a perennial corky trunk, woody rootstock or taproot; not or faintly aromatic; indumentum of simple hairs
Morphology Stem
Stems annual or perennial, quadrangular or roundedquadrangular, usually branching; hairs with or without lignified bases
Morphology Leaves
Leaves opposite, ternate or quadrate, sometimes forming a rosette at base of annual stems; upper leaves subtending heads similar in form to leaves below but often coloured, sometimes conspicuously caudate, rarely membranous
Morphology Reproductive morphology Flowers
Flowers hermaphrodite, arranged in (2–)6(–9)-flowered verticils; verticils condensed into tight heads; bracts often coloured, broadly obovate or rhombic, obscuring pedicels and calyces, overlapping bracts subtending adjacent verticils; pedicels short and inconspicuous; heads arranged in a lax or dense corymb or panicle
Morphology Reproductive morphology Flowers Calyx
Calyx bilabiate, small and densely villose in flower; fruiting calyx curved upwards, dorso-ventrally flattened, distally pubescent, villose or tomentose; lips pressed together, opening slightly at throat when nutlets mature; posterior lip entire with a rounded or acute apex, 3angled or 3-toothed, hooded or flat; anterior lip entire and rounded or truncate, emarginate or 2-toothed, shorter, equal to, or more rarely longer than the posterior lip
Morphology Reproductive morphology Flowers Corolla
Corolla short, bilabiate; tube straight, dorsally gibbous at midpoint, dilating towards throat, interior with a V of hairs at base of median lobes of posterior lip and with scattered hairs at base of other lobes; posterior lip 3- or 4-lobed, when 4-lobed then median lobes smaller than lateral lobes; anterior lip horizontal, entire, slightly concave; lobes pubescent with sessile glands
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 4, shortly exserted from throat; posterior pair basally swollen, attached to corolla at or around corolla midpoint; anterior pair attached at corolla throat; filaments basally swollen and pubescent; anthers synthecous, reniform to orbicular, dorsifixed
Morphology Reproductive morphology Flowers Disc
Disk 4-lobed with the anterior lobe larger
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary glabrous, deeply 4-lobed; style gynobasic, apex bifid with linear lobes
Morphology Reproductive morphology Fruits
Nutlets brown or black, ovoid, apex rounded or flattened, minutely longitudinally ridged, base with a small scar or this sometimes obscured by dark diskderived material, usually producing a small amount of mucilage when wet.

[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
Shrubs or herbs, sometimes geoxylic, not or faintly aromatic
Morphology Leaves
Leaves simple, opposite, more rarely ternate or quadrate, regularly spaced and also sometimes in rosettes either at ground level or at apex of a short woody trunk
Morphology Reproductive morphology Inflorescences
Inflorescence thyrsoid, much condensed, forming solitary or paniculately arranged heads with cymes sessile, 3-flowered
Morphology Reproductive morphology Inflorescences Bracts
Bracts persistent, often basally coloured
Morphology Reproductive morphology Flowers Calyx
Calyx dorso-ventrally flattened, curving upwards, 2-lipped, 2- to 5-lobed (1-3/1-2), posterior lip entire with rounded or acute apex, 3-angled or 3-toothed, hooded or flat, anterior lip entire and rounded or truncate, emarginate or 2-toothed, lips connive
Morphology Reproductive morphology Flowers Corolla
Corolla 2-lipped, usually 5-lobed (4/1), white, pink or blue, posterior lip ascending, (3-)4-lobed, median lobes usually exceeding the lateral lobes, anterior lip horizontal, entire, slightly concave, tube straight, dorsally gibbous at midpoint, dilating
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 4, declinate, exserted, posterior pair attached near midpoint of corolla, basally pubescent and swollen, anterior attached at corolla throat
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma lobes equal, linear
Morphology Reproductive morphology Flowers Disc
Disc 4-lobed with anterior lobe larger
Morphology Reproductive morphology Fruits
Nutlets ovoid, minutely striate, weakly mucilaginous when wet.
Note
2n = 28, 56.  Thirty-five species
Distribution
In Tropical Africa
Ecology
In grassland, open woodland, some species on mineral rich soil, others in wet areas.

Native to:

Angola, Benin, Burkina, Burundi, Cabinda, Cameroon, Central African Repu, Chad, Congo, Eritrea, Ethiopia, Gabon, Ghana, Guinea, Guinea-Bissau, Ivory Coast, Kenya, Madagascar, Malawi, Mali, Mozambique, Namibia, Niger, Nigeria, Rwanda, Senegal, Sierra Leone, Sudan, Tanzania, Togo, Uganda, Zambia, Zaïre, Zimbabwe

Haumaniastrum P.A.Duvign. & Plancke appears in other Kew resources:

First published in Biol. Jaarb. 27: 224 (1959)

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.
  • Paton, A.J., Bramley, G., Ryding, O., Polhill, R., Harvey, Y., Iwarsson, M., Willis, F., Phillipson, P., Balkwill, K., Lukhoba, C., Otiend, D & Harley (2009). Lamiaceae (Labiatae) Flora of Tropical East Africa: 1-430.

Literature

Flora of West Tropical Africa

  • Morton in J. Linn. Soc. 58: 239 (1962).
  • in Biol. Jaarb. 27: 222 (1959)

Flora of Tropical East Africa

  • Biol. Jaarb. 27: 222–257 (1959)
  • J.L.S. 58: 239–241 (1962)
  • K.B. 52: 293–378 (1997)
  • Kubitzki, Fam. Gen. Vasc. Pl. 7: 263 (2004)
  • Trav. Publ. Univ. Libre Lab. Bot. Syst. 33: 222–257 (1959)

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
  • Haumaniastrum P. A. Duvign. & Plancke, Biol. Jaarb. 27: 222 (1959)
  • Paton, Kew. Bull. 52: 293-378 (1997), rev.
  • idem, Trav. & Publ. Univ. Libre. Lab. Bot. Syst. 33: 222 (1959)

Flora of Tropical East Africa
Flora of Tropical East Africa
http://creativecommons.org/licenses/by-nc-sa/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