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Scientific Name | Geissorhiza nana Klatt |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
National Status |
Status and Criteria | Near Threatened B1ab(ii,iii,iv,v) |
Assessment Date | 2023/06/11 |
Assessor(s) | D. Raimondo |
Justification | This species has an extent of occurrence (EOO) of 6238 km² and an area of occupancy (AOO) of 76 km². It is known from 13 extant locations but is likely to occur at a few more as it is highly likely to be overlooked due to its small size. It is threatened by habitat loss to crop cultivation, livestock grazing and alien plant invasion. It is therefore listed as Near Threatened, almost meeting criteria B to be listed as Vulnerable. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | An endemic to the Western Cape province of South Africa, restricted to the Caledon, Bredasdorp and Swellendam Districts. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Eastern Ruens Shale Renosterveld, Central Ruens Shale Renosterveld, Western Ruens Shale Renosterveld, Garden Route Shale Fynbos, Greyton Shale Fynbos, Elim Ferricrete Fynbos, Swellendam Silcrete Fynbos |
Description | It occurs in renosterveld on clay flats and slopes. |
Threats |
| Only small fragments of this species' natural habitat remains after extensive habitat loss (78% loss calculated using landcover data in GIS) to wheat cultivation. Remaining subpopulations are threatened by overgrazing and competition from alien invasive plants. |
Population |
The population has a decreasing trend and is known from 13 extant subpopulations.
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Population trend | Decreasing |
Conservation |
| It has not been recorded in any formally protected areas. |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Geissorhiza nana Klatt | VU B1ab(ii,iii,iv,v) | 2012.1 | | Geissorhiza nana Klatt | VU B1ab(ii,iii,iv,v) | Raimondo et al. (2009) | |
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.
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. 2023. Geissorhiza nana Klatt. National Assessment: Red List of South African Plants version . Accessed on 2024/09/14 |
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