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Scientific Name | Hesperantha oligantha (Diels) Goldblatt |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
Synonyms | Lapeirousia oligantha Diels |
National Status |
Status and Criteria | Critically Endangered D |
Assessment Date | 2021/06/11 |
Assessor(s) | D. Raimondo, P. Goldblatt, L. von Staden & T. Patel |
Justification | This range restricted species has an extent of occurrence (EOO) and area of occupancy (AOO) of 12 km². It is known from a single, small population of about 30 mature individuals. It is therefore listed as Critically Endangered under criterion D. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Northern Cape |
Range | It is endemic to the summit plateau of the Hantamsberg above Calvinia in Northern Cape, South Africa. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Hantam Plateau Dolerite Renosterveld |
Description | It occurs in mountain renosterveld, marshy ground in seasonal streams, seeps and shallow pools on moist, south-facing slopes. |
Threats |
| There are no severe threats to the population. Habitat degradation due to livestock farming is a potential threat. |
Population |
The population is extremely small and localized, consisting of fewer than 30 mature individuals.
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Population trend | Stable |
Conservation |
| Not currently conserved in any formally protected area. |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Hesperantha oligantha (Diels) Goldblatt | CR B1ab(iii); C2a(i,ii); D | Raimondo et al. (2009) | | Hesperantha oligantha (Diels) Goldblatt | Rare | Hilton-Taylor (1996) | | Hesperantha oligantha (Diels) Goldblatt | Uncertain | Hall et al. (1980) | |
Bibliography |
Goldblatt, P. 1984. A revision of Hesperantha (Iridaceae) in the winter rainfall area of southern Africa. Journal of South African Botany 50:14-141.
Goldblatt, P. 2003. A synoptic review of the African genus Hesperantha (Iridaceae: Crocoideae). Annals of the Missouri Botanical Garden 90(3):390-443.
Goldblatt, P. and Manning, J.C. 2020. Iridaceae of southern Africa. Strelitzia 42. South African National Biodiversity Institute, Pretoria.
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.
Manning, J., Goldblatt, P. and Snijman, D. 2002. The color encyclopedia of Cape bulbs. Timber Press, Portland/Cambridge.
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., von Staden, L. & Patel, T. 2021. Hesperantha oligantha (Diels) Goldblatt. National Assessment: Red List of South African Plants version . Accessed on 2025/04/13 |
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