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This genus is accepted, and its native range is Tropical & S. Africa, Madagascar, S. Arabian Peninsula, India to Indo-China.
A specimen from Kew's Herbarium

[FSOM]

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

Morphology General Habit
Perennial herbs, subshrubs or dwarf shrubs
Morphology Leaves
Leaves simple, entire
Morphology Reproductive morphology Inflorescences
Flowers in axillary or terminal spicate to globose inflorescences; bracts in 4 or 6 rows, overlapping, acuminate to spinescent, each supporting a single sessile or subsessile flower; branched spines representing sterile inflorescences sometimes present at base of or surrounding the fertile inflorescences
Morphology Reproductive morphology Flowers Calyx
Calyx deeply divided into 2 parts, the upper 3-veined, the lower 2-veined, each vein ending in a tooth or the teeth fused into a single acute apex
Morphology Reproductive morphology Flowers Corolla
Corolla white to pink, purple or blue; tube short, cylindrical; limb funnel-shaped with a shallowly 2-lobed upper lip and a 3-lobed lower lip
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 4, upper pair 2-celled, lower pair 1-celled
Morphology Reproductive morphology Flowers Gynoecium Style
Style filiform; stigma with a single flattened lobe
Morphology Reproductive morphology Fruits
Capsule oblong to triangular-ovate, 2–4-seeded
Morphology Reproductive morphology Seeds
Seeds flattened, with hygroscopic hairs.
Distribution
Over 30 species in tropical Africa, Madagascar, the Arabian Peninsula and tropical Asia.

[FZ]

Flora Zambesiaca Acanthaceae (part 2) by Iain Darbyshire, Kaj Vollesen and Ensermu Kelbessa

Morphology General Habit
Perennial herbs including suffrutices with annual stems from woody rootstocks, subshrubs or shrubs; cystoliths conspicuous or not.
Morphology Leaves
Leaves opposite, entire.
Morphology Reproductive morphology Inflorescences
Inflorescences axillary or terminal, spicate to globose, sometimes subtended by bract-like leaves, sometimes with sterile spinose inflorescences at base of or surrounding fertile inflorescences; bracts in 4 or 6 rows, imbricate, with 3–7 prominent veins, each subtending a single sessile or subsessile flower.
Morphology Reproductive morphology Flowers Calyx
Calyx 2-lipped, deeply divided between lips, dorsal lip 3-veined, ventral 2-veined, veins each terminating in a tooth or the teeth fused into a single apex.
Morphology Reproductive morphology Flowers Corolla
Corolla puberulous outside in bands along middle of lobes, inside hairy in a ventral band; basal cylindric tube short; throat broadly funnel-shaped; lobes spreading to suberect; lower lip of 3 broad triangular lobes, upper lip of 1 shortly bifid lobe.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 4, didynamous, inserted at base of throat, included, ventral pair inserted below dorsal pair; ventral pair with bithecous anthers, dorsal pair with monothecous anthers, thecae oblong, hairy.
Morphology Reproductive morphology Flowers Gynoecium Style
Style glabrous; stigma with a single flattened linear-oblong lobe, upper lobe missing.
Morphology Reproductive morphology Fruits
Capsule 2–4-seeded, oblong or triangular-ovate, usually glabrous.
Morphology Reproductive morphology Seeds
Seeds discoid, covered with hygroscopic hairs.
Distribution
A genus of 30 species in tropical Africa, Madagascar, Arabia and tropical Asia, especially numerous in NE and E Africa.

Native to:

Angola, Bangladesh, Cambodia, Cameroon, Central African Repu, Chad, Djibouti, Ethiopia, Guinea, India, Kenya, Laos, Madagascar, Malawi, Mali, Mozambique, Myanmar, Northern Provinces, Oman, Senegal, Socotra, Somalia, Sudan, Tanzania, Vietnam, Yemen, Zambia, Zaïre, Zimbabwe

Neuracanthus Nees appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Hornby [2067A], Tanzania 17163.000

First published in N.Wallich, Pl. Asiat. Rar. 3: 76 (1832)

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. 5: 137.

Flora Zambesiaca

  • in De Candolle, Prodr. 11: 248 (1847).
  • in Wallich, Pl. Asiat. Rar. 3: 76, 97 (1832).
  • —Bidgood & Brummitt in Kew Bull. 53: 1–76 (1998).

Flora of Somalia

  • Bidgood & Brummitt in Kew Bull. 53: 1–76 (1998).
  • Flora Somalia, (2000) Author: by M. Thulin [updated by M. Thulin 2008]

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

Herbarium Catalogue Specimens

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