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Scientific Name | Geissorhiza arenicola Goldblatt |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
National Status |
Status and Criteria | Vulnerable B1ab(iii,iv,v)+2ab(iii,iv,v) |
Assessment Date | 2021/10/11 |
Assessor(s) | P. Goldblatt, R.C. Turner & T. Patel |
Justification | This species has an extent of occurrence (EOO) of 2315 km², and an area of occupancy (AOO) of 44 km². It is known from nine locations that continue to decline due to ongoing habitat loss to rooibos tea cultivation. It is therefore listed as Vulnerable under criterion B. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Northern Cape, Western Cape |
Range | An endemic to South Africa, that is found in the Bokkeveld mountains in the Northern Cape province, and the Gifberg and northern Olifants River mountains in Western Cape province. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Nardouw Sandstone Fynbos, Graafwater Sandstone Fynbos, Bokkeveld Sandstone Fynbos |
Description | It occurs in stony sandstone ground, usually in seasonally moist sites, on dry montane fynbos or mountain renosterveld. |
Threats |
| This species has lost 20% of its habitat (calculated using landcover data in GIS). It is threatened by ongoing habitat loss to expanding rooibos tea cultivation in the Nieuwoudtville and Trawal areas. |
Population |
Subpopulations tend to be small and localized, although one collection from a protected area indicates that plants in undisturbed situations can be locally abundant. The population suspected to declining due to habitat loss.
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Population trend | Decreasing |
Conservation |
| It is conserved in the Oorlogskloof Nature Reserve. |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Geissorhiza arenicola Goldblatt | VU B1ab(iii,iv,v) | Raimondo et al. (2009) | | Geissorhiza arenicola Goldblatt | 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.
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.
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 |
| Goldblatt, P., Turner, R.C. & Patel, T. 2021. Geissorhiza arenicola Goldblatt. National Assessment: Red List of South African Plants version . Accessed on 2024/09/08 |
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