Acanthaceae (Black-eyed susan family)

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There are about 350 genera and 4350 species worldwide (mainly in the tropics and subtropics), with about 43 genera and 351 species in southern Africa.

Genera native to southern Africa

Information from Balkwill & Welman (2000), Welman (2003), Leistner (2005), Flora of Zimbabwe and Flora of Mozambique.

Acanthopale Fifteen species, native to the Old World tropics, with one species, Acanthopale pubescens, native to Zimbabwe and Mozambique where it is found in the understorey of evergreen forest. See Flora of Zimbabwe.
Acanthopsis Eight species, endemic to southern Africa, occurring in arid regions.
Adhatoda Many species in the Old World tropics. Two species are native to southern Africa.
Anisotes Nineteen species, native to Africa, Arabian Peninsula and Madagascar. Three species are native to southern Africa.
Asystasia About 70 species, native from Africa to the East Indies and Australia. Nine species are native to southern Africa.
Avicennia About eight species, found in coastal mangroves lagoons worldwide. The only species native to southern Africa is Avicennia marina. This genus was previously placed in its own family, the Avicenniaceae, but evidence now suggests that it is part of the Acanthaceae (see Angiosperm Phylogeny Website).
Barleria About 250 species, found worldwide but mainly in the tropics. Seventy species are native to southern Africa.
Blepharis About 80 species, found from Africa and the Mediterranean to the East Indies. There are 51 species in southern Africa.
Brillantaisia About 40 species, native to tropical Africa and Madagascar, with two species native to southern Africa (Zimbabwe and Mozambique).
Chaetacanthus The 3 species are endemic to southern Africa.
Chorisochora Of the 3 species, 2 are found on Socotra and 1 in southern Africa.
Crabbea About 12 species of which 7 are native to southern Africa.
Crossandra About 50 species, native to Africa, Arabian Peninsula, India and Madagascar. Four species are found in southern Africa.
Dicliptera About 150 species, found worldwide in warm and tropical regions. There are 15 species native to southern Africa . In addition, Dicliptera suberecta, which is native to Uruguay, is cultivated in gardens in the region.
Duosperma The 12 species are native to Africa with 2 occurring in southern Africa.
Duvernoia The 2 species are native to Mozambique and southern Africa.
Dyschoriste About 65 species, occurring worldwide in tropical and warm areas. In southern Africa there are 11 species.
Ecbolium The 22 species are found from Africa to India with 3 occurring in southern Africa.
Elytraria About 7 species, native to Africa, Asia and America, with 1 species, Elytraria lyrata occurring in southern Africa.
Glossochilus The 2 species are endemic to southern Africa.
Hygrophila A mainly tropical genus of about 100 species with 10 species native to southern Africa.
Hypoestes About 40 species, found from Africa to Asia, East Indies and Australia, with 3 species occurring in southern Africa.
Isoglossa About 50 species, found in the Old World, mainly in the tropics. There are 15 species in southern Africa.
Justicia About 420 species, found worldwide in warm areas. There are 23 species native to southern Africa and at least seven exotic species that are cultivated in gardens of this region, including Justicia brandegeeana (Shrimp plant) pictured on the right.
Lepidagathis About 100 species, found worldwide in warm and tropical areas. Two species are native to southern Africa.
Mackaya The single species, Mackaya bella, is native to southern Africa.
Megalochlamys The 10 species are native to Africa and the Arabian Peninsula with 4 species occurring in southern Africa.
Metarungia The 3 species are native to Africa, 2 of which occur in southern Africa.
Monechma About 40 species, mainly African but also occurring in India. There are 19 species in southern Africa.
Nelsonia The 5 species are native to Africa, India, Australia and South America. One species, Nelsonia canescens, occurs in southern Africa.
Neuracanthus About 20 species, native to Africa, and from the Arabian Peninsula to India. There is one species in southern Africa, Neuracanthus africanus.
Peristrophe About 15 species , occurring from Africa to the East Indies. In southern Africa there are 11 species.
Petalidium About 35 species, native from Africa to India. In southern Africa there are 28 species.
Phaulopsis About 20 species, native from Africa to India, with 3 species occurring in southern Africa.
Pseuderanthemum About 60 species, found worldwide in the tropics. There are 2 species in southern Africa.
Rhinacanthus About 22 species, native from Africa to Asia. In southern Africa there are 3 species.
Ruellia About 150 species, native to America, Africa, Asia and Australia. About 15 species in southern Africa.
Ruelliopsis There are 2-3 species, African with 2 species in southern Africa.
Ruspolia The 4 species are native to Africa and Madagascar, 3 of which occur in southern Africa.
Ruttya There are 3 species; African with 1 species, Ruttya ovata, occurring in southern Africa.
Salpinctium The 3 species are endemic to southern Africa.
Sclerochiton About 12 species, native to Africa with 6 species occurring in southern Africa.
Siphonoglossa About 8 species, native to Africa and America. There are 3 species native to southern Africa.
Thunbergia About 100 species, native to Old World, mainly in the tropics. There are 11 species in southern Africa. Common species: Thunbergia alata (Black-eyed Susan).

Other genera, cultivated in southern Africa

List from Glen (2002).

Acanthus Four species cultivated, including Acanthus mollis (Bear's breech), a common garden plant (see picture right). Acanthus pubescens occurs as a garden escapee along roadsides in Harare (see Flora of Zimbabwe), but this is possibly not yet sufficient for it to be classified as a naturalised species.
Anisacanthus Two species cultivated.
Aphelandra Two species cultivated.
Blechum pyramidatum (Sornia) Indigenous from Mexico through to South America.
Eranthemum Three species cultivated.
Fittonia Two species cultivated.
Graptophyllum Two species cultivated.
Hemigraphis
Megaskepasma erythrochlamys Native to Venezuela.
Odontonema Two species cultivated.
Pachystachys Two species cultivated.
Sanchezia oblonga Native to Ecuador.
Strobilanthes Two species cultivated.
Whitfieldia elongata Native to tropical Africa.
Xantheranthemum igneum Native to Peru.

Publications

• Baden, C., Balkwill, K., Getliffe Norris, F.M., Immelman, K.L., Manning, J.C. & Munday, J. 1995. Acanthaceae: Justiciinae. Flora of southern Africa 30: 1–2, 6–10, 18–46.

• Balkwill, K. 1995. Rhinacanthus. Flora of southern Africa 30: 11–14.

• Balkwill, K. 1996. A sysnopsis of Peristrophe in southern Africa. Bothalia 26: 83–93.

• Balkwill, K. & Balkwill, M.-J. 1988. Taxonomic studies in the Acanthaceae: a new species of Dicliptera. South African Journal of Botany 54: 55–59.

• Balkwill, K., Balkwill, M.-J., Gesell, S. & Melville, K. 1994. Specific concepts in some Acanthaceae and in Becium (Labiatae). In: J.H. Seyani & A.C. Chikuni (eds), Proceedings of the 13th Plenary Meeting of AETFAT, Vol. 1: 347–358.

• Balkwill, K., Balkwill, M.-J. & Getliffe Norris, F.M. 1988. Taxonomic studies in the Acanthaceae: the Peristrophe grandibracteata complex. South African Journal of Botany 54: 55–59.

• Balkwill, K., Cadman, M.-J. [=Balkwill, M-J. & Getliffe Norris, F.M. 1985. Taxonomic studies in the Acanthaceae: new species of Peristrophe from the Limpopo Valley. South African Journal of Botany 51: 485–488.

• Balkwill, K., Cadman, M.-J. [=Balkwill, M-J.] & Getliffe Norris, F.M. 1986. Dicliptera fruticosa. Flowering Plants of Africa 49: t.1933.

• Balkwill, K., Cadman, M.-J. [=Balkwill, M-J.] & Getliffe Norris, F.M. 1987. Dicliptera capensis. Flowering Plants of Africa 49: t.1952.

• Balkwill, K. & Cambell, G.J. 1999. Taxonomic studies in Acanthaceae: testa microsculpturing in southern African species of Thunbergia. Botanical Journal of the Linnean Society 131: 301–325.

• Balkwill, K. & Getliffe Norris, F.M. 1985. Taxonomic studies in the Acanthaceae; the genus Hypoestes in southern Africa. South African Journal of Botany 51: 133–144.

• Balkwill, K. & Getliffe Norris, F.M. 1988. Classification of the Acanthaceae: a southern African perspective. In: P. Goldblatt & P.P. Lowry II (eds), Proceedings of the 11th Plenary Meeting of AETFAT. Monographs in Systematic Botany from the Missouri Botanical Garden 25: 503–516.

• Balkwill, K. & Getliffe Norris, F.M. 1989. Taxonomic studies in Acanthaceae: Persistrophe decorticans, a new species. South African Journal of Botany 55: 254–258.

• Balkwill, K., Getliffe Norris, F.M. & Balkwill, M.-J. 1996. Systematic studies in the Acanthaceae: Dicliptera in southern Africa. Kew Bulletin 51: 1–61.

• Balkwill, K., Getliffe Norris, F.M. & Schoonraad, E. 1986. Taxonomic studies in Acanthaceae: testa microsculpturing in southern African species of Peristrophe. South African Journal of Botany 52: 513–520.

• Balkwill, M.-J. & Balkwill, K. 1994. Systematic studies in the Acanthaceae: Barleria: the problem of subdivision. In: J.H. Seyani & A.C. Chikuni (eds), Proceedings of the 13th Plenary Meeting of AETFAT, Vol. 2: 1257–1267.

• Balkwill, M.-J. & Balkwill, K. 1996. Problems with generic delimitation and subdivision in a large genus, Barleria L. (Acanthaceae). In: The biodiversity of African plants. Proceedings of the 14th AETFAT Congress. Kluwer Academic Publications, Dordrecht.

• Balkwill, M.-J. & Balkwill, K. 1997. Delimitation and infrageneric classification of Barleria (Acanthaceae). Kew Bulletin 52: 1–39.

• Balkwill, M.-J. & Balkwill, K. 1998. A preliminary analysis of distribution patterns in a large pantropical genus, Barleria (Acanthaceae). Journal of Biogeography 25: 95–110.

• Balkwill, M.-J., Balkwill, K. & VINCENT, P.L.D. 1990. Systematic studies in the Acanthaceae: a new species of Barleria from Natal. South African Journal of Botany 56: 571–576.

• Balkwill, K. & Welman, W.G. 2000. Acanthaceae. In: Seed Plants of Southern Africa (ed. O.A. Leistner). Strelitzia 10: 34-45. National Botanical Institute, Pretoria.

• Balkwill, M.-J., Stalmans, M.C. & Balkwill, K. 1992. Systematic studies in the Acanthaceae: a new species of Barleria from the northeastern Transvaal, with some notes on its ecology. South African Journal of Botany 58: 286–291.

• Champluvier, D. & Figueiredo, E. 1996. A new combination and a new name in Oreacanthus (Acanthaceae). Bulletin du Jardin Botanique National de Belgique 65: 413–417.

• Clarke, C.B. 1901. Acanthaceae. Flora Capensis 5,1: 1-92.

• Edwards, T.J. & Getliffe Norris, F.M. 1989. Salpinctium: a new genus of Acanthaceae in southern Africa. South African Journal of Botany 55: 6–10.

• Edwards, T.J. & Getliffe Norris, F.M. 1993. Salpinctium natalense. Flowering Plants of Africa 52: t.2077.

• Edwards, T.J. & Getliffe Norris, F.M. 1993. Salpinctium stenosiphon. Flowering Plants of Africa 52: t.2078.

• Figueiredo, E. 1996. Typification troubles in the genus Brachystephanus. Acanthus 6: 3.

• Figueiredo, E. & JURY, S. 1996. Notes on Brachystephanus (Acanthacae). Kew Bulletin 51: 753– 763.

• Figueiredo, E. & Keith-Lucas, M. 1996. Pollen morphology of Brachystephanus (Acanthaceae). Grana 35: 65–73.

• Getliffe Norris, F.M., Balkwill, K. & Manning, J.C. 1985. New combinations and synonyms in southern African Acanthaceae. South African Journal of Botany 51: 489.

• Glen, H.F. 1986. Anisotes rogersii. Flowering Plants of Africa 49: t.1926.

• Immelman, K.L. 1984. Justicia flava. Flowering Plants of Africa 48: t.1898.

• Glen, H.F. 2002. Cultivated Plants of Southern Africa. Jacana, Johannesburg.

• Immelman, K.L. 1984. Justicia petiolaris. Flowering Plants of Africa 48: t.1897.

• Immelman, K.L. 1985. Justicia capensis. Flowering Plants of Africa 48: t.1920.

• Immelman, K.L. 1986. Justicia anselliana. Flowering Plants of Africa 49: t.1932.

• Immelman, K.L. 1986. Justicia bolusii. Flowering Plants of Africa 49: t.1931.

• Immelman, K.L. 1986. Notes on some South African species of Justicia (Acanthaceae). Bothalia 16: 39–41.

• Immelman, K.L. 1989. Notes on African plants: Acanthaceae—Siphonoglossa and Aulojusticia in southern Africa. Bothalia 19: 209–210.

• Immelman, K.L. 1989. Studies in the southern African species of Justicia and Siphonoglossa (Acanthaceae): palynology. Bothalia 19: 151–156.

• Immelman, K.L. 1990. Studies in the southern African species of Justicia and Siphonoglossa (Acanthaceae): indumentum. Bothalia 20: 61–66.

• Immelman, K.L. 1990. Studies in the southern African species of Justicia and Siphonoglossa (Acanthaceae): seeds. Bothalia 20: 49–59.

• Immelman, K.L. 1992. Studies in the southern African species of Justicia and Siphonoglossa (Acanthaceae): final conclusions. Bothalia 22: 171–175.

• Leistner, O. A. 2005. Seed Plants of southern tropical Africa: families and genera. Southern African Botanical Diversity Network Report No. 26.

• Lowrey, T.K. & Crawford, D.J. 1987. Electrophoretic confirmation of the intergeneric hybrid X Ruttyruspolia (Acanthaceae). Plant Systematics and Evolution 158: 29–35.

• Manning, J.C. & Getliffe Norris, F.M. 1985. Taxonomic studies in the Acanthaceae: a reappraisal of the genera Duvernoia and Adhatoda in southern Africa. South African Journal of Botany 51: 475–484.

• Manning, J.C. & Getliffe Norris, F.M. 1995. Adhatoda. Flora of southern Africa 30: 62–64.

• Manning, J.C. & Getliffe Norris, F.M. 1995. Duvernoia. Flora of southern Africa 30: 15–17.

• Meyer, P.G. 1968. Acanthaceae. Prodromus einer Flora von Südwestafrika 130: 1-65.

• Retief, E. & Reyneke, W.F. 1984. The genus Thunbergia in southern Africa. Bothalia 15: 107–116.

• Vollesen, K.B. 1981. Notes on Brillantaisia pubescens (Acanthaceae) with particular reference to discontinuity in flower size. Kew Bulletin 36: 569–573.

• Vollesen, K.B. 1989. A revision of Megalochlamys and Ecbolium (Acanthaceae: Justicieae). Kew Bulletin 44: 601–680.

• Vollesen, K.B. 1990. The genus Crossandra on the African continent. Kew Bulletin 45: 503–534.

• Vollesen, K.B. 1990. Notes on Crossandra Salisb. (Acanthaceae). Kew Bulletin 45: 121–135.

• Vollesen, K.B. 1991. The identity of Asystasia striata S. Moore (Acanthaceae). Kew Bulletin 46: 729–731.

• Vollesen, K.B. 1991. A revision of the African genus Sclerochiton (Acanthaceae: Acantheae). Kew Bulletin 46: 1–50.

• Vollesen, K.B. 1994. Delimitation of Angkalanthus (Acanthaceae: Justcieae) and the new genus Chorisochora. Kew Bulletin 49: 469–479.

• Vollesen, K.B. 1994. The genus Streptosiphon (Acanthaceae: Acantheae). Kew Bulletin 49: 401–407.

• Vollesen, K.B. 1994. Taxonomy, ecology and distribution of Nelsonia (Acanthaceae) in Africa. In: J.H. Seyani & A.C. Chikuni (eds), Proceedings of the 13th Plenary Meeting of AETFAT, Vol. 1: 315–325. National Herbarium and Botanic Gardens of Malawi, Zomba.

• VOS, W. & Edwards, T.J. 1992. The genus Crossandra Salisb. (Acanthaceae) in South Africa, including a new species. South African Journal of Botany 58: 94–99.

• Welman, W.G. 2003. Acanthaceae. In Germishuizen, G. & Meyer, N.L. (eds), Plants of southern Africa: an annotated checklist. Strelitzia 14: 92-106. National Botanical Institute, Pretoria.