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Scientific Name | Gladiolus quadrangulus (D.Delaroche) Barnard |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
Synonyms | Geissorhiza quadrangula (D.Delaroche) Ker Gawl., Gladiolus biflorus Klatt, Gladiolus linearis (L.f.) N.E.Br., Ixia linearis L.f., Ixia quadrangula D.Delaroche |
National Status |
Status and Criteria | Endangered B1ab(iii,v) |
Assessment Date | 2005/11/19 |
Assessor(s) | D. Raimondo, P. Goldblatt & H. Preston |
Justification | EOO 2514 km², known from seven severely fragmented subpopulations. Urban expansion has destroyed the majority of subpopulations on the Cape Flats. Threatened by encroachment from invasive alien acacias and annual grasses at all locations, and by water extraction and livestock overgrazing at some locations around Darling. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | Malmesbury to Cape Flats. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Cape Flats Sand Fynbos, Atlantis Sand Fynbos, Hopefield Sand Fynbos |
Description | Rocky sandstone slopes and sandy soil in seasonal wetlands, often slightly saline or brackish. |
Threats |
| Invasive Alien Species (direct effects), Habitat loss |
Population |
Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Gladiolus quadrangulus (D.Delaroche) Barnard | EN B1ab(iii,v) | Raimondo et al. (2009) | | Gladiolus quadrangulus (D.Delaroche) Barnard | Endangered | Hilton-Taylor (1996) | | Gladiolus quadrangulus (D.Delaroche) Barnard | Endangered | Hall et al. (1980) | |
Bibliography |
Goldblatt, P. and Manning, J.C. 1998. Gladiolus in southern Africa. Fernwood Press, Vlaeberg.
Goldblatt, P. and Manning, J.C. 2000. Cape Plants: A conspectus of the Cape Flora of South Africa. Strelitzia 9. National Botanical Institute, Cape Town.
Hall, A.V., De Winter, M., De Winter, B. and Van Oosterhout, S.A.M. 1980. Threatened plants of southern Africa. South African National Scienctific Programmes Report 45. CSIR, Pretoria.
Hilton-Taylor, C. 1996. Red data list of southern African plants. Strelitzia 4. South African National Botanical Institute, Pretoria.
Lewis, G.J., Obermeyer, A.A. and Barnard, T.T. 1972. Gladiolus: a revision of the South African species. Journal of South African Botany Supplement 10:1-316. Purnell, Cape Town.
Raimondo, D., von Staden, L., Foden, W., Victor, J.E., Helme, N.A., Turner, R.C., Kamundi, D.A. and Manyama, P.A. 2009. Red List of South African Plants. Strelitzia 25. South African National Biodiversity Institute, Pretoria.
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Citation |
| Raimondo, D., Goldblatt, P. & Preston, H. 2005. Gladiolus quadrangulus (D.Delaroche) Barnard. National Assessment: Red List of South African Plants version . Accessed on 2025/05/31 |
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