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This genus is accepted, and its native range is Tropical & Subtropical Old World.
Basilicum polystachyon

[FSOM]

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

Morphology General Habit
Annual aromatic herbs
Morphology Reproductive morphology Inflorescences
Inflorescences thyrse-like, rather lax; bracts smaller than and distinct from the leaves (leaves in inflorescences often intermediate); cymes (1–)3-flowered, without peduncle; bracteoles absent
Morphology Reproductive morphology Flowers Calyx
Calyx 5-lobed; upper lobe large, shortly decurrent along the tube; 2 lateral lobes oblique-deltoid with recurved tip; 2 lower lobes lanceolate, subulate
Morphology Reproductive morphology Flowers Corolla
Corolla small, 2-lipped; upper lip 4-lobed, almost flat; lower lip entire, oblong, almost flat
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens directed to the lower lip of the corolla; anthers 1-celled
Morphology Reproductive morphology Flowers Gynoecium Style
Style-branches short
Morphology Reproductive morphology Fruits
Nutlets ovoid, smooth.
Distribution
Genus with a single species in the tropical parts of the Old World.

[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
Annual herb, aromatic
Morphology Stem
Stems branched
Morphology Leaves
Leaves simple
Morphology Reproductive morphology Inflorescences
Inflorescence thyrsoid with cymes sessile, usually 3-, more rarely fewer-flowered, flowers usually secund
Morphology Reproductive morphology Inflorescences Bracts
Bracts persistent, not coloured, inconspicuous
Morphology Reproductive morphology Flowers Calyx
Calyx shortly tubular, straight or curving upwards, strongly 2-lipped, 5-lobed (1/4), lobes unequal, posterior rounded, decurrent, curving upwards, lateral lobes deltoid, with a prominent shoulder, anterior lobes subulate, throat open, glabrous
Morphology Reproductive morphology Flowers Corolla
Corolla very small, 2-lipped, 5-lobed (4/1), white, purple or bluish, posterior lip ascending, 4-lobed with median lobes exceeding lateral lobes, anterior lip horizontal, concave, corolla-tube straight, parallel-sided, dilating towards throat
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 4 held over lower lip, posterior pair attached above midpoint of corolla-tube, glabrous, inappendiculate, anterior pair attached at corolla throat
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 equally 4-lobed
Morphology Reproductive morphology Fruits
Nutlets ± ovoid, glabrous, mucilaginous.
Note
2n = 28, 30.  One species, B. polystachyon (L.) Moench, widespread in the Old World tropics
Ecology
On watersides and seasonally flooded areas.
Distribution
Native to: Tropical Africa, Southern Africa, Western Indian Ocean, Arabian Peninsula, China, Eastern Asia, Indian Subcontinent, Indo-China, Malesia, Papuasia and Australia

[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 herbs
Morphology Stem
Stems erect, branching
Morphology Leaves
Leaves opposite, petiolate
Morphology Reproductive morphology Flowers
Flowers hermaphrodite, disposed in a lax inflorescence, in 6- or sometimes fewerflowered verticils; bracts inconspicuous
Morphology Reproductive morphology Flowers Calyx
Calyx bilabiate, posterior lip ovate, decurrent on tube, anterior lip 4-lobed, lateral lobes deltate, median lanceolate; fruiting calyx with posterior lip accrescent; posterior margin of lateral lobe of anterior lip extended towards the posterior lip; throat open, glabrous
Morphology Reproductive morphology Flowers Corolla
Corolla bilabiate, posterior lip 4-lobed, anterior lip entire; tube straight, dilating distally
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 4, declinate, equal, shortly exserted; posterior pair attached above the tube midpoint; anterior attached at corolla throat; filaments inappendiculate, glabrous; anthers dorsifixed, synthecous
Morphology Reproductive morphology Flowers Disc
Disk equally 4-lobed
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary glabrous, deeply lobed; style gynobasic, capitate with 2 rounded, short adpressed lobes
Morphology Reproductive morphology Fruits
Nutlets dark brown or brown with a small basal scar, producing mucilage when wet; embryo straight, exalbuminous.
Note
Probably a monotypic genus occurring in the Old World tropics. A proposal to conserve Moschosma Rchb. was turned down by the Nomenclatural Committee, see Taxon 19: 481 (1970) & 21: 534 (1972). Very similar to Orthosiphon, differing only in the smaller flowers, nutlets which produce a lot rather than a little or no mucilage and the equally lobed disk. Molecular evidence suggests a relationship with Platostoma, see Paton et al. in Molecular Phylogenetics and Evolution 31: 277–299 (2004).

[KBu]

Suddee, S., A. J. Paton, & Parnell, J. (2005). Taxonomic Revision of Tribe Ocimeae Dumort. (Lamiaceae) in Continental South East Asia III. Ociminae. Kew Bulletin, 60(1), 3-75. Retrieved from http://www.jstor.org/stable/4110885

Morphology General Habit
Erect annual or perennial herbs
Morphology Leaves
Leaves petiolate, opposite, membranous, crenate- serrate
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 4, didynamous, declinate, slightly exserted, inappendiculate, glabrous; posterior pair attached slightly below throat; anterior pair longer, attached at the base of anterior corolla lobe; filaments free; anthers reniform, synthecous, often confluent
Morphology Reproductive morphology Flowers Calyx
Calyx tubular-campanulate in flower and fruit, declinate, bilabiate; posterior lip 1-lobed, broad, slightly decurrent on tube; anterior lip 4- lobed, median teeth ± equal to posterior, slightly curved upwards, lateral teeth broader than median teeth, slightly shorter; tube slightly constricted at throat, with 10 longitudinal veins, without an anterior spur at base; throat glabrous
Morphology Reproductive morphology Flowers Corolla
Corolla slightly exserted from calyx tube; posterior lip 3-lobed, median lobe broadest, entire or emarginate; anterior lip entire, slightly concave, slightly longer than posterior; tube short, dilated towards throat, glabrous
Morphology Reproductive morphology Flowers Disc
Disc with anterior side well developed
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary glabrous
Morphology Reproductive morphology Flowers Gynoecium Style
Style declinate, clavate-capitate and shortly bifid at apex
Morphology Reproductive morphology Fruits
Nutlets ovoid or ellipsoid, smooth, producing mucilage when wet.
Morphology Reproductive morphology Inflorescences
Inflorescence terminal or axillary, simple or branched; verticils laxly arranged close together forming a lax spike-like inflorescence; cymes sessile or subsessile, unbranched, 3 - 4-flowered, often 3- flowered; bracts small, clawed at base, persistent, forming a small apical coma; pedicels slightly curved downwards at apex in fruit, sometimes pedicels bent into one lateral side and the infructescence becomes secund
Morphology Stem
Stems quadrangular, usually sparsely scabrid at angles, much branched
Type
Type species: Basilicum polystachyon (L.) Moench (Ocimum polystachyon L.).

[FZ]

Combretaceae, A. W. Exell. Flora Zambesiaca 4. 1978

Morphology General Habit
Small evergreen trees or shrubs. Mangroves.
Morphology Leaves
Leaves spirally arranged, sessile or subsessile, fleshy-coriaceous.
Morphology Reproductive morphology Flowers
Flowers hermaphrodite, 5-merous, actinomorphic, red, white, pink or yellow, in short terminal spikes or racemes.
Morphology Reproductive morphology Flowers Receptacle
Receptacle not externally differentiated into an upper and lower part but produced beyond the inferior ovary to form a tube bearing 2 adnate persistent bracteoles and terminating in a 5-lobed persistent calyx (or 5 sepals).
Morphology Reproductive morphology Flowers Corolla
Petals 5, caducous.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens (5)10, 2-seriate.
Morphology Reproductive morphology Flowers Disc
Disk inconspicuous.
Morphology Reproductive morphology Flowers Gynoecium Style
Style filiform, persistent, not adnate to the wall of the receptacle, not expanded at the apex.
Morphology Reproductive morphology Flowers Gynoecium Ovary Ovules
Ovules 2–5.
Morphology Reproductive morphology Fruits
Fruit indehiscent, compressed-ellipsoid and obtusely angled, ± woody, crowned by the persistent calyx.
Morphology Reproductive morphology Seeds
Cotyledons unknown.

Native to:

Angola, Bangladesh, Benin, Bismarck Archipelago, Borneo, Burkina, Burundi, Cambodia, Cameroon, Central African Repu, Chad, China Southeast, Comoros, Congo, Ethiopia, Ghana, Hainan, India, Ivory Coast, Jawa, Kenya, KwaZulu-Natal, Lesser Sunda Is., Madagascar, Malawi, Malaya, Maluku, Mauritius, Mozambique, Myanmar, New Guinea, Niger, Nigeria, Northern Provinces, Northern Territory, Philippines, Queensland, Rwanda, Saudi Arabia, Solomon Is., Somalia, Sri Lanka, Sudan, Sulawesi, Sumatera, Swaziland, Taiwan, Tanzania, Thailand, Togo, Uganda, Vietnam, Western Australia, Zambia, Zaïre, Zimbabwe

Introduced into:

Caroline Is.

Basilicum Moench appears in other Kew resources:

First published in Suppl. Meth.: 143 (1802)

Accepted by

  • Govaerts, R. (1996). World Checklist of Seed Plants 2(1, 2): 1-492. MIM, Deurne.
  • 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

  • Suppl. Meth. Pl. 143 (1802).

Flora of Somalia

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

Flora of Tropical East Africa

  • Kubitzki, Fam. Gen. Vasc. Pl. 7: 262 (2004)
  • Suppl. Meth. Pl.: 143 (1802), non Basilicum Rumph.

Lamiaceae Key Genus Fact Sheets

  • Basilicum Moench, Suppl. Meth. Pl.: 143 (1802).
  • 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
  • Lehmannia Jacq. ex Jacq.f., Ecl. Pl. Rar. 2: t. 108 (1844).
  • Lumnitzera Jacq. ex Spreng., Syst. Veg. 2: 687 (1825), nom. illeg.
  • Moschosma Rchb., Consp. Regn. Veg.: 171 (1828).
  • Perxo Raf., Autik. Bot.: 121 (1840).

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

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 Bulletin
Kew Bulletin
http://creativecommons.org/licenses/by-nc-sa/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