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This genus is accepted, and its native range is NE. Tropical Africa, Arabian Peninsula, Pakistan to India.
Lawsonia inermis

[FSOM]

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

Morphology General Habit
Shrub or small tree; all parts glabrous
Morphology Reproductive morphology Inflorescences
Inflorescence a dense terminal panicle Flowers 4-merous
Morphology Reproductive morphology Flowers Hypanthium
Hypanthium shorter than sepals, sinus-horns absent
Morphology Reproductive morphology Flowers Corolla
Petals present
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 4 or 4 pairs (rarely 9–12), opposite sepals, all equal, exserted
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary sessile, subglobose, 2–4-celled; style persistent, longer than stamens, stigma capitate
Morphology Reproductive morphology Fruits
Fruit depressed-globose, indehiscent or breaking up irregularly
Morphology Reproductive morphology Seeds
Seeds many, subtetrahedral (4-sided).
Distribution
A single species only, throughout the Old World tropics, widely grown as a dye-plant; introduced to the New World tropics.

[FTEA]

Lythraceae, B. Verdcourt. Flora of Tropical East Africa. 1984

Morphology General Habit
Shrub or small tree
Morphology Leaves
Leaves decussate, subsessile, entire; stipules minute, conic
Morphology Reproductive morphology Flowers
Flowers regular, 4-merous, in terminal pyramidal panicles, the pedicels with basal or median very deciduous bracteoles
Morphology Reproductive morphology Flowers Calyx
Calyx broadly turbinate, subcoriaceous; lobes ovate without any intermediary appendages
Morphology Reproductive morphology Flowers Corolla
Petals broadly reniform, very shortly clawed, cordate at the base, very crumpled in bud
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 4, 8 or rarely 9–12; filaments ± thick, subulate
Morphology Reproductive morphology Flowers Gynoecium Pistil
Ovary sessile, subglobose, 2–4-locular; style ± thick, slightly overtopping the stamens
Morphology Reproductive morphology Fruits
Fruit globose, indehiscent or breaking irregularly, the fruiting calyx flattened
Morphology Reproductive morphology Seeds
Seeds many, tetragonal; cotyledons flat.

[FZ]

Lythraceae, A. Fernandes. Flora Zambesiaca 4. 1978

Morphology General Habit
Shrub or small tree.
Morphology Leaves
Leaves decussate, elliptic to oblanceolate, entire.
Morphology Reproductive morphology Flowers
Flowers 4-merous, bisexual, in lax leafy terminal panicles.
Morphology Reproductive morphology Flowers Calyx
Calyx turbinate with the tube short; lobes spreading and broadly ovate; appendages absent.
Morphology Reproductive morphology Flowers Corolla
Petals broadly ovate, cordate at base, very much corrugated in bud.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens exserted, 4 opposite to the sepals or often 8 in pairs also opposite to the sepals or rarely 9–12 temate; filaments filiform-subulate; anthers broadly oblong.
Morphology Reproductive morphology Flowers Gynoecium Pistil
Ovary sessile, subglobose, 2–4-locular; style thick, continuous with placentas, persistent, a little longer than the stamens; stigma capitate.
Morphology Reproductive morphology Fruits
Fruit globose, indehiscent or disrupting irregularly.
Morphology Reproductive morphology Seeds
Seeds many, thick, 4-sided; cotyledons flat.

Native to:

Djibouti, Eritrea, Ethiopia, India, Kenya, Oman, Pakistan, Panamá, Saudi Arabia, Somalia, Tanzania, Yemen

Introduced into:

Algeria, Andaman Is., Aruba, Assam, Bahamas, Bangladesh, Benin, Burkina, Cameroon, Cayman Is., Central African Repu, Chad, Comoros, Costa Rica, Cuba, Dominican Republic, East Himalaya, Ecuador, Ghana, Guinea, Guinea-Bissau, Gulf of Guinea Is., Guyana, Haiti, Iraq, Ivory Coast, Jamaica, Jawa, KwaZulu-Natal, Laos, Lebanon-Syria, Leeward Is., Lesser Sunda Is., Liberia, Libya, Madagascar, Maldives, Mali, Marianas, Mauritania, Mexico Southwest, Morocco, Mozambique, Myanmar, Netherlands Antilles, New Guinea, Nicobar Is., Niger, Nigeria, Palestine, Puerto Rico, Senegal, Sierra Leone, Sri Lanka, Sudan, Suriname, Tadzhikistan, Togo, Trinidad-Tobago, Tunisia, Turks-Caicos Is., Uganda, Venezuela, Venezuelan Antilles, Vietnam, Windward Is., Zaïre

Lawsonia L. appears in other Kew resources:

First published in Sp. Pl.: 349 (1753)

Accepted by

  • Govaerts, R., Nic Lughadha, E., Black, N., Turner, R. & Paton, A. (2021). The World Checklist of Vascular Plants, a continuously updated resource for exploring global plant diversity. https://doi.org/10.1038/s41597-021-00997-6 Scientific Data 8: 215.

Literature

Flora of West Tropical Africa

  • —F.T.A. 2: 482.

Flora Zambesiaca

  • Gen. Pl. ed. 5: 166(1754).
  • Sp. Pl. 1: 349(1753)

Flora of Somalia

  • Flora Somalia, Vol 1, (1993) Author: by M. G. Gilbert & M. Thulin [updated by M. Thulin 2008]

Flora of Tropical East Africa

  • Koehne in E.P. IV. 216: 270 (1903)
  • L., Gen. Pl., ed. 5: 166 (1754)
  • Sp. Pl: 349 (1753)

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 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