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This genus is accepted, and its native range is Tropical & S. Africa, Madagascar.
Hoslundia opposita Vahl

[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
Perennial woody herb or shrub
Morphology Stem
Stems erect or scandent, woody
Morphology Leaves
Leaves opposite or ternate, usually petiolate
Morphology Reproductive morphology Flowers
Flowers hermaphrodite, 2(–4)-flowered verticils, disposed in a lax or dense, paniculately branched inflorescence; bracts small, forming a very small apical coma
Morphology Reproductive morphology Flowers Calyx
Calyx persistent, shortly tubular, conspicously 10veined, ± regular with 5 ± equal, linear to deltate, lobes; fruiting calyx becoming globose, fleshy, brightly coloured and with throat closed by lobes pressing together at least at their bases
Morphology Reproductive morphology Flowers Corolla
Corolla bilabiate, white, greenish or yellow; tube straight, ± parallel-sided, dilating towards throat and very slightly dorsally gibbous, exceeding the calyx; posterior lip 4-lobed, with the median narrower than the laterals; anterior lip horizontal, concave, enclosing the anterior staminal filaments
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 4, declinate; posterior sterile, inappendiculate and short, included within tube, attaching to the corolla above the tube midpoint; anterior pair shortly exserted, attaching to the corolla at throat; anthers dorsifixed, synthecous, ± orbicular with the thecae ± convergent
Morphology Reproductive morphology Flowers Disc
Disk 4-lobed with anterior lobe larger
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary glabrous, deeply 4-lobed; style gynobasic, capitate with branches erect, adpressed and equal
Morphology Reproductive morphology Fruits
Nutlets brown, broadly ovoid with a small basal scar, minutely roughened, with raised areas darker, producing a small amount of mucilage when wet; embryo straight, exalbuminous.

[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, aromatic
Morphology Leaves
Leaves simple, opposite or sometimes ternate
Morphology Reproductive morphology Inflorescences
Inflorescence sometimes ternately or quadrately branched, thyrsoid with cymes sessile, 1-flowered
Morphology Reproductive morphology Inflorescences Bracts
Bracts persistent, not coloured, often inconspicuous
Morphology Reproductive morphology Flowers Calyx
Calyx ± regular, tubular, straight, becoming orange, globular and fleshy in fruit, 5-lobed, ± actinomorphic, lobes linear to deltoid, posterior sometimes slightly broader, not decurrent, throat closed in fruit, glabrous
Morphology Reproductive morphology Flowers Corolla
Corolla strongly 2-lipped, 5-lobed (4/1), white or pink, posterior lip ascending, 4-lobed with median lobes exceeding lateral lobes, anterior lip horizontal, slightly concave, corolla-tube straight, parallel-sided, dilating towards throat
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 4, posterior pair sterile, held within tube, attached above midpoint of tube, pubescent, inappendiculate, anterior pair held over anterior lip or just exceeding it, attached at corolla throat, glabrous
Morphology Reproductive morphology Flowers Gynoecium Style
Style capitate-clavate
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma-lobes equal, rounded, connivent
Morphology Reproductive morphology Flowers Disc
Disc 4-lobed with anterior lobe larger
Morphology Reproductive morphology Fruits
Nutlets ± ovoid, glabrous, mucilaginous.
Note
2n = 24. Monotypic, H. opposita Vahl.
Distribution
Found in tropical Africa
Ecology
Open areas in grassland, woodland or forest, often on sandy or rocky soil.

[FSOM]

M. Thulin et al. Flora of Somalia, Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Morphology Reproductive morphology Inflorescences
Inflorescences thyrse-like, rather lax, with several usually rather short branches; bracts small and distinct from the leaves; cymes 1–2-flowered, without peduncle; bracteoles absent
Morphology Reproductive morphology Flowers Calyx
Calyx 5-lobed, with very prominent ribbed veins, becoming globose and fleshy after anthesis and yellowish in the fruiting stage
Morphology Reproductive morphology Flowers Corolla
Corolla 2-lipped; upper lip 3(–4)-lobed, almost flat; lower lip longer, shallowly boat-shaped
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens inserted in the distal part of the corolla-tube; posterior pair sterile and dwarfed; anterior pair rather short and included in the lower lip of the corolla
Morphology Reproductive morphology Flowers Gynoecium Style
Style-branches short
Morphology Reproductive morphology Fruits
Nutlets subglobose or broadly ellipsoid, slightly pustulate, smooth.
Distribution
A single species in Africa.

[LKGF]
Use
Sometimes used medicinally.

Native to:

Angola, Benin, Botswana, Burkina, Burundi, Cameroon, Caprivi Strip, Central African Repu, Chad, Congo, Equatorial Guinea, Eritrea, Ethiopia, Gabon, Gambia, Ghana, Guinea, Guinea-Bissau, Gulf of Guinea Is., Ivory Coast, Kenya, KwaZulu-Natal, Liberia, Madagascar, Malawi, Mali, Mozambique, Namibia, Niger, Nigeria, Northern Provinces, Rwanda, Senegal, Sierra Leone, Somalia, Sudan, Swaziland, Tanzania, Togo, Uganda, Zambia, Zaïre, Zimbabwe

Hoslundia Vahl appears in other Kew resources:

First published in Enum. Pl. Obs. 1: 212 (1804)

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

Flora of West Tropical Africa

  • —F.T.A. 5: 377.

Flora of Somalia

  • Flora Somalia, (2000) Author: by O. Ryding [updated by M. Thulin 2008]

Flora of Tropical East Africa

  • Enum. Pl. 1: 212 (1804)
  • Kubitzki, Fam. Gen. Vasc. Pl. 7: 261 (2004)

Lamiaceae Key Genus Fact Sheets

  • Haaslundia Schumach. & Thonn. in C.F.Schumacher, Beskr. Guin. Pl.: 15 (1827).
  • 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
  • Hoslundia Vahl, Enum. Pl. 1: 212 (1804).
  • Micranthes Bertol., Mem. Reale Accad. Sci. Ist. Bologna 9: 172 (1858).

Flora of Somalia
Flora of Somalia
http://creativecommons.org/licenses/by-nc-sa/3.0

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