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This genus is accepted, and its native range is Tropical & S. Africa to India.
Endostemon tenuiflorus

[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, aromatic
Morphology Leaves
Leaves simple
Morphology Reproductive morphology Inflorescences
Inflorescence thyrsoid with cymes sessile, 1-7-flowered
Morphology Reproductive morphology Inflorescences Bracts
Bracts persistent, smaller than leaves, often inconspicuous, not coloured
Morphology Reproductive morphology Flowers Calyx
Calyx tubular, tubular-campanulate or spherical, straight, actinomorphic with deltoid to lanceolate lobes in one species, otherwise strongly 2-lipped, 5-lobed (1/4), lobes unequal, posterior rounded (rarely much expanded, membranous and developing coiled Lateral teeth lanceolate or deltoid, sometimes linear with a truncate or rounded apex, anterior lobes lanceolate to linear, teeth sometimes closing throat, throat sometimes densely hairy, rarely fruiting calyx deciduous as a dispersal unit
Morphology Reproductive morphology Flowers Corolla
Corolla 2-lipped or very weakly so, 4-5-lobed, white, pink or blue, posterior lip forward pointing or spreading, 3-lobed with median lobe emarginate, rarely equally 4-lobed, anterior lip horizontal or more rarely spreading, tube straight or slightly curve
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 4, included or shortly exserted, porrect; posterior and anterior pairs regularly spaced and attached near corolla throat, short, pilose or glabrous
Morphology Reproductive morphology Flowers Gynoecium Style
Style forming a small shield above nutlets, capitate-clavate at apex
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma lobes rounded, equal or with the posterior lobe longer, parallel
Morphology Reproductive morphology Flowers Disc
Disc equally 4-lobed
Morphology Reproductive morphology Fruits
Nutlets  obovoid to oblong-cylindrical, sometimes truncate and pubescent at apex, strongly or weakly mucilaginous.
Note
Nineteen species in tropical and Southern Africa, one in India and Madagascar
Ecology
Woodland or grassland
Distribution
West Tropical Africa, West-Central Tropical Africa, Northeast Tropical Africa, East Tropical Africa, South Tropical Africa, Southern Africa, Western Indian Ocean, Arabian Peninsula, Indian Subcontinent

[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
Aromatic annual or perennial herbs, woody herbs or suffrutices
Morphology Stem
Stems sometimes prostrate, usually erect, branching above, woody at base
Morphology Leaves
Leaves opposite
Morphology Reproductive morphology Flowers
Flowers hermaphrodite, arranged in 2–6-flowered verticils in a lax inflorescence; bracts small, sometimes forming an inconspicuous apical coma
Morphology Reproductive morphology Flowers Calyx
Calyx persistent, spreading, ascending or downward-pointing, shortly tubular or tubular-campanulate, bilabiate; posterior lip ovate, decurrent; anterior lip 4-lobed; fruiting calyx with posterior lip accresent; throat open, glabrous, anterior lip with 4 lanceolate lobes, the median pair longer than the lateral pair, or throat glabrous, closed by the convergent linear, obliquely truncate to rounded lateral lobes and the lanceolate median lobes of the anterior lip being pressed against the posterior lip, or throat closed with a ring of dense, villose hairs, anterior lip with lanceolate to deltate lateral lobes and linear, slightly cucullate median lobes
Morphology Reproductive morphology Flowers Corolla
Corolla white, pink, purple or bluish, slightly bilabiate, 4-lobed with the posterior lobe sometimes emarginate or bifid; tube straight, dilating at throat, villose where stamens adnate
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 4, declinate, held within the corolla; filaments free, very short, villose, adnating to the corolla throat or just below, regularly spaced, not all together on the anterior side of the throat; anthers dorsifixed, synthecous, thecae convergent
Morphology Reproductive morphology Flowers Disc
Disk equally 4-lobed
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary glabrous or pubescent at apex, deeply 4-lobed; style gynobasic with a basal swelling just above the nutlets, stigma capitate with lobes rounded and adpressed
Morphology Reproductive morphology Fruits
Nutlets black or brown, ovoid or narrowly ovoid, apex rounded or truncate, smooth with a small basal scar, producing a lot or a small amount of mucilage when wet; embryo straight, exalbuminous.
Note
The genus is divided into four sections, three of which occur in East Africa, see Paton et al., loc. cit (1994). Sect. Leucosphaeri A. Paton, Harley & M.M. Harley (Fig. 31: 5–6, p. 197) is found in Ethiopia and Somalia.

[FSOM]

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

Morphology General Habit
Herbs or subshrubs,with unbranched or rarely branched hairs
Morphology Reproductive morphology Inflorescences
Inflorescences thyrse- or raceme-like, lax or rather lax; bracts smaller and usually distinct from the leaves; cymes 1–3-flowered; almost without peduncle; bracteoles absent or rarely present
Morphology Reproductive morphology Flowers Calyx
Calyx 5-lobed, open or closed in fruit; tube glabrous or strongly hairy inside the mouth; upper lobe usually much broader than other lobes, ± concave and decurrent along the distal third of the tube, or sometimes ± as broad as other lobes, flat and not decurrent; lateral lobes variously shaped; lower lobes as long as or longer than the lateral ones
Morphology Reproductive morphology Flowers Corolla
Corolla 4–5-lobed, hardly 2-lipped or 2-lipped with 2-lobed upper lip and 3-lobed lower lip, with flat or shallowly concave lobes
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens inserted in the distal part of the corolla-tube, not or only very shortly protruding beyond the mouth of the corolla-tube; filaments very short or reduced; anthers 1-celled
Morphology Reproductive morphology Flowers Gynoecium Style
Style hardly protruding, with a basal swelling just above the ovary; branches short
Morphology Reproductive morphology Fruits
Nutlets ovoid to oblong, glabrous or pubescent at the apex.
Distribution
Genus with 20 species in Africa, the Arabian peninsula and India.

Native to:

Angola, Assam, Botswana, Burkina, Burundi, Cameroon, Cape Provinces, Central African Repu, Chad, Djibouti, Eritrea, Ethiopia, Ghana, Gulf States, India, Ivory Coast, Kenya, KwaZulu-Natal, Madagascar, Malawi, Mali, Mauritania, Mozambique, Namibia, Niger, Northern Provinces, Oman, Saudi Arabia, Senegal, Socotra, Somalia, Sri Lanka, Sudan, Swaziland, Tanzania, Uganda, Yemen, Zambia, Zaïre, Zimbabwe

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

First published in W.H.Harvey & auct. suc. (eds.), Fl. Cap. 5(1): 295 (1910)

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

  • Ashby in J. Bot. 74: 121 (1936).
  • in Fl. Cap. 5, 1: 295 (1910)

Flora of Somalia

  • Flora Somalia, (2000) Author: by O. Ryding [updated by M. Thulin 2008]
  • Paton & al. in Kew Bull. 49: 673–716 (1994).

Flora of Tropical East Africa

  • Fl. Cap. 5 (1): 295 (1910)
  • J.B. 74: 121–132(1936)
  • K.B. 49: 673–716 (1994)
  • Kubitzki, Fam. Vasc. Pl. 7: 262 (2004)

Lamiaceae Key Genus Fact Sheets

  • Ashby, in J. Bot. 74: 121-132 (1936), rev.
  • Endostemon N.E. Br. in Thistleton-Dyer, Fl. Cap. 5,1: 295 (1910)
  • 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
  • Paton, Harley, Harley & Weeks, Kew Bull. 49: 673-716 (1994), rev.
  • Pseudocimum Bremek., Ann. Transvaal Mus. 15: 251 (1933).
  • Puntia Hedge, Notes Roy. Bot. Gard. Edinburgh 41: 115 (1983).

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