| Scientific Name | Geissorhiza heterostyla L.Bolus | Higher Classification | Monocotyledons | Family | IRIDACEAE | Synonyms | Geissorhiza rogersii N.E.Br., Geissorhiza rosea (Klatt) R.C.Foster |
National Status | Status and Criteria | Least Concern | Assessment Date | 2021/09/07 | Assessor(s) | J.E. Victor, A.P. Dold, R.C. Turner & T. Patel | Justification | This is the most widespread species in the genus, with an extent of occurrence (EOO) of 140 566 km², and an area of occupancy (AOO) of 512 km². It is common and not threatened, and is therefore listed as Least Concern. |
Distribution | Endemism | South African endemic | Provincial distribution | Eastern Cape, Northern Cape, Western Cape | Range | It is widespread through the Greater Cape Floristic Region, extending from the Langberg and Kubiskou Mountains in the western Karoo in the Northern Cape province of South Africa, through the Roggeveld and Witteberg in the Western Cape province and along the South Coast as far east as Port Elizabeth in the Eastern Cape province. |
Habitat and Ecology | Major system | Terrestrial | Major habitats | Roggeveld Shale Renosterveld, Montagu Shale Renosterveld, Matjiesfontein Shale Renosterveld, Tanqua Escarpment Shrubland, Central Mountain Shale Renosterveld, Swellendam Silcrete Fynbos, Kouebokkeveld Shale Fynbos, Swartberg Shale Fynbos, Breede Shale Fynbos, Greyton Shale Fynbos, Montagu Shale Fynbos, Garden Route Shale Fynbos, Overberg Sandstone Fynbos, Breede Sand Fynbos, North Sonderend Sandstone Fynbos, South Sonderend Sandstone Fynbos, North Langeberg Sandstone Fynbos, Hawequas Sandstone Fynbos, Matjiesfontein Shale Fynbos, South Langeberg Sandstone Fynbos, Albertinia Sand Fynbos, Tsitsikamma Sandstone Fynbos, Knysna Sand Fynbos, Eastern Coastal Shale Band Vegetation, Eastern Inland Shale Band Vegetation, Central Coastal Shale Band Vegetation, Central Inland Shale Band Vegetation, Western Coastal Shale Band Vegetation, Northern Inland Shale Band Vegetation, Swartland Alluvium Fynbos, Elim Ferricrete Fynbos, Hantam Plateau Dolerite Renosterveld, Roggeveld Karoo, Hantam Karoo, Breede Shale Renosterveld, Ceres Shale Renosterveld, Nieuwoudtville Shale Renosterveld, Humansdorp Shale Renosterveld, Langkloof Shale Renosterveld, Uniondale Shale Renosterveld, Swartberg Shale Renosterveld, Mossel Bay Shale Renosterveld, North Outeniqua Sandstone Fynbos, Central Ruens Shale Renosterveld, Potberg Sandstone Fynbos, Nieuwoudtville-Roggeveld Dolerite Renosterveld, Ruens Silcrete Renosterveld, South Hex Sandstone Fynbos, Algoa Sandstone Fynbos, Kouga Grassy Sandstone Fynbos, South Kammanassie Sandstone Fynbos, North Kammanassie Sandstone Fynbos, South Swartberg Sandstone Fynbos, North Swartberg Sandstone Fynbos, South Outeniqua Sandstone Fynbos, Breede Alluvium Fynbos, Eastern Ruens Shale Renosterveld | Description | It occurs on various soils, often on heavy clay or in stony sandstone ground in well-drained sites, also on limestone substrates. |
Threats | | It is threatened by habitat degradation mainly as a result of invasive alien species encroachment. |
Population | Despite some loss, the population is suspected to have a stable trend as it is widespread and common.
| Population trend | Stable |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Geissorhiza heterostyla L.Bolus | Least Concern | Raimondo et al. (2009) | | Geissorhiza heterostyla L.Bolus | Not Threatened | Hilton-Taylor (1996) | | Geissorhiza rogersii N.E.Br. | Uncertain | Hall et al. (1980) | |
Bibliography | Goldblatt, P. 1985. Systematics of the southern African genus Geissorhiza (Iridaceae-Ixioideae). Annals of the Missouri Botanical Garden 72(2):277-447.
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.
Goldblatt, P. and Manning, J.C. 2020. Iridaceae of southern Africa. Strelitzia 42. South African National Biodiversity Institute, Pretoria.
Goldblatt, P., Manning, J.C. and Nänni, I. 2009. New species of Geissorhiza (Iridaceae:Crocoideae) from the southern African winter rainfall zone, range extensions, taxonomic changes, and notes on pollen morphology. Bothalia 39(2):123-152.
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.
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.
Vlok, J. and Schutte-Vlok, A.L. 2010. Plants of the Klein Karoo. Umdaus Press, Hatfield.
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Citation | | Victor, J.E., Dold, A.P., Turner, R.C. & Patel, T. 2021. Geissorhiza heterostyla L.Bolus. National Assessment: Red List of South African Plants version . Accessed on 2024/09/08 |
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