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Scientific Name | Geissorhiza inaequalis L.Bolus |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
National Status |
Status and Criteria | Least Concern |
Assessment Date | 2023/05/30 |
Assessor(s) | D. Raimondo & P. Goldblatt |
Justification | This species has an extent of occurrence (EOO) of 5932 km², and an area of occupancy (AOO) of 64 km². It is known from 14 to 20 subpopulations, the population is stable and faces no significant threats. It is therefore listed as Least Concern. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Northern Cape |
Range | This species is known from the vicinity of Nieuwoudtville in Northern Cape, South Africa. It is also found near Clanwilliam and Tulbagh in the Western Cape. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Citrusdal Vygieveld, Breede Shale Renosterveld, Citrusdal Shale Renosterveld, Nieuwoudtville Shale Renosterveld, Vanrhynsdorp Shale Renosterveld, Nieuwoudtville-Roggeveld Dolerite Renosterveld |
Description | It grows in heavy red clay soils associated with rocky doleritic outcrops. |
Threats |
| It has lost 26% of its habitat (calculated using landcover data in GIS), however, it is not in danger of extinction as the threats are very slight. It only grows amongst rocks in Dolerite Kopies, and this habitat is safe from ploughing. |
Population |
Previously thought to have a small population and listed nationally as rare in 2006, field surveys since 2006 have doubled the number of known subpopulations. Some of the recently recorded subpopulations have high numbers of mature individuals. The population trend is stable.
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Population trend | Stable |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Geissorhiza inaequalis L.Bolus | Rare | Raimondo et al. (2009) | | Geissorhiza inaequalis L.Bolus | Rare | Hilton-Taylor (1996) | |
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.
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.
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Citation |
| Raimondo, D. & Goldblatt, P. 2023. Geissorhiza inaequalis L.Bolus. National Assessment: Red List of South African Plants version . Accessed on 2024/12/06 |
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