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This genus is accepted, and its native range is Tropical & Subtropical America, Tropical Africa, Madagascar.
A specimen from Kew's Herbarium


Acanthaceae (part 1), Kaj Vollesen, Flora of Tropical East Africa, 2008

Morphology General Habit
Perennial herbs or (on Madagascar) shrubs.
Morphology Leaves
Leaves opposite or in whorls of 4.
Morphology Reproductive morphology Flowers
Flowers single, sessile, in dense or lax sessile or pedunculate racemiform cymes; bracts small or large and foliaceous, lower sterile; bracteoles 2, linear to lanceolate, acuminate.
Morphology Reproductive morphology Flowers Calyx
Calyx glumaceous, divided to the base in 5 1-toothed sepals which are thickened and horny at base, dorsal slightly longer and wider than the rest.
Morphology Reproductive morphology Flowers Corolla
Corolla glabrous on the outside (hairy in Madagascar); tube linear, widened above stamens; limb subequally 5-lobed, 2 upper lobes erect and slightly narrower, 3 lower spreading.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 4, inserted in tube, subsessile; anthers 1-thecous, included, curved, oblong with apiculate tip, finely bearded.
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary with 2 ovules per locule, glabrous; style glabrous or sparsely hairy; stigma with 2 broad subequal lobes or the upper larger.
Morphology Reproductive morphology Fruits
Capsule 2–4-seeded, oblong-ellipsoid to triangular in outline, beaked, glumaceous, glabrous and shiny.
Morphology Reproductive morphology Seeds
Seed discoid, tuberculate.
Range: About 50 species from southern USA to Argentina and Chile, 10 species in tropical Africa and 10 species in Madagascar.

Native to:

Angola, Argentina Northeast, Argentina Northwest, Bahamas, Bolivia, Brazil North, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, Cabinda, Cameroon, Central African Repu, Chile Central, Colombia, Congo, Cuba, Dominican Republic, Ecuador, El Salvador, Florida, Gabon, Georgia, Ghana, Guatemala, Guinea, Gulf of Guinea Is., Haiti, Honduras, Ivory Coast, Leeward Is., Liberia, Madagascar, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, New Mexico, Nicaragua, Nigeria, Paraguay, Peru, Puerto Rico, Rwanda, Sierra Leone, Sudan, Tanzania, Texas, Turks-Caicos Is., Uganda, Uruguay, Venezuela, Windward Is., Zaïre

Stenandrium Nees appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Irwin, H.S. [6867], Brazil K001032805
Usteri, A. [207], Brazil K001032806
Irwin, H.S. [5867], Brazil K001032804

First published in J.Lindley, Intr. Nat. Syst. Bot., ed. 2: 444 (1836)

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. Scientific Data 8: 215.


Flora of Tropical East Africa

  • Ann. Miss. Bot. Gard. 71: 1028 (1984)
  • DC., Prodr. 11: 28 (1847)
  • E. & P. Pf. IV, 3b: 320 (1895)
  • G.P. 2: 1096 (1876)
  • Journ. Arn. Arbor. 51: 281 (1970)
  • K.B. 47: 176 (1992)
  • Lindl., Intr. Nat. Syst. Bot., ed. 2: 444 (1836), nom. conserv.
  • Lundell, Fl. Texas 1: 257 (1966)

Flora of Tropical East Africa
Flora of Tropical East Africa

Herbarium Catalogue Specimens
Digital Image © Board of Trustees, RBG Kew

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at and
© Copyright 2017 World Checklist of Selected Plant Families.

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at and
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families.