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Scientific Name | Geissorhiza foliosa Klatt |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
National Status |
Status and Criteria | Near Threatened B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,v) |
Assessment Date | 2021/10/13 |
Assessor(s) | L. von Staden & T. Patel |
Justification | This species has an extent of occurrence (EOO) of 6606 km², and an area of occupancy (AOO) of 116 km². It is known from 18 extant locations, and is threatened by ongoing loss and degradation of habitat as a result of crop cultivation and encroachment from invasive alien species. 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 | It is local in the southern parts of the Western Cape province, South Africa, where it occurs along the southern slopes and foothills of the Langeberg Mountains, with a few isolated records from the Outeniqua and Rooiberg mountains. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Swellendam Silcrete Fynbos, Cape Lowland Alluvial Vegetation, Eastern Ruens Shale Renosterveld, South Langeberg Sandstone Fynbos, Central Coastal Shale Band Vegetation |
Description | It occurs on clay or clay loam slopes and flats in renosterveld and fynbos. |
Threats |
| This species has lost 39% of its habitat (calculated using landcover data in GIS), and is threatened by ongoing habitat loss, fragmentation and degradation due to agricultural expansion, particularly crop cultivation. It has also lost habitat to timber plantations on the southern slopes of the Langeberg in the past. Plants on small remaining fragments are in addition threatened by competition from alien invasive plants and overgrazing. |
Population |
It is known from less than 20 subpopulations, and has a decreasing population trend.
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Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Geissorhiza foliosa Klatt | NT 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 |
| von Staden, L. & Patel, T. 2021. Geissorhiza foliosa Klatt. National Assessment: Red List of South African Plants version . Accessed on 2024/09/14 |
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