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Scientific Name | Namaquanula bruce-bayeri D.Müll.-Doblies & U.Müll.-Doblies |
Higher Classification | Monocotyledons |
Family | AMARYLLIDACEAE |
Synonyms | Hessea bruce-bayeri (D.Müll.-Doblies & U.Müll.-Doblies) Snijman, Namaquanula etesionamibensis D.Müll.-Doblies & U.Müll.-Doblies |
National Status |
Status and Criteria | Critically Endangered C2a(i) |
Assessment Date | 2021/04/09 |
Assessor(s) | D.A. Snijman, D. Raimondo & L. von Staden |
Justification | Between two and four small subpopulations, all consisting of fewer than 50 mature individuals, continue to decline due to ongoing habitat loss and degradation. This species therefore qualifies for listing as Critically Endangered under criterion C. |
Distribution |
Endemism | Not endemic to South Africa |
Provincial distribution | Northern Cape |
Range | This species' range stretches from Lüderitz (southern Namibia) to the Richtersveld between Beesbank and Sendelingsdrif (Northern Cape). |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Western Gariep Hills Desert, Western Gariep Lowland Desert, Lower Gariep Alluvial Vegetation |
Description | Plants grow in sandy and gravely alluvial flats. |
Threats |
| The westernmost subpopulations of this species are threatened by severe, ongoing habitat loss to open-cast mining, and it is possibly already locally extinct in this area, where it was last recorded in the 1980s. Further east, both remaining subpopulations are threatened by trampling and habitat degradation due to severe overstocking of rangelands, with livestock allowed to graze within the Richtersveld National Park. |
Population |
This species has a limited range in South Africa, where it is known from about four small, scattered subpopulations, all consisting of less than 50 mature individuals. Outside the Richtersveld National Park, it was last recorded in the 1980s. This area is now a mining site, and it is not certain whether the subpopulations survived. There are two subpopulations in the western section of the Richtersveld National Park, both threatened by severe overgrazing. The South African population is estimated to number fewer than 200 mature individuals. This species also occurs in southern Namibia, where it is also known from only a few records, scattered over a wide area. This species is only capable of short-distance dispersal, and rescue effects from the Namibian population are unlikely (D. Snijman pers. comm.).
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Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Namaquanula bruce-bayeri D.Müll.-Doblies & U.Müll.-Doblies | CR C2a(i) | 2015.1 | | Namaquanula bruce-bayeri D.& U.Müll.-Doblies | VU B1ab(ii,iii) | Raimondo et al. (2009) | | Namaquanula bruce-bayeri D.& U.Müll.-Doblies | VU B1B2bc | Victor (2002) | | Hessea bruce-bayeri (D.& U.Müll.-Doblies) Snijman | Vulnerable | Hilton-Taylor (1996) | |
Bibliography |
Hilton-Taylor, C. 1996. Red data list of southern African plants. Strelitzia 4. South African National Botanical Institute, Pretoria.
Meerow, A. and Snijman, D.A. 2001. Phylogeny of Amaryllidaceae tribe Amaryllideae based on nrDNA ITS sequences and morphology. American Journal of Botany 88(12):2321-2330.
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.
Victor, J.E. 2002. South Africa. In: J.S. Golding (ed), Southern African plant Red Data Lists. Southern African Botanical Diversity Network Report 14 (pp. 93-120), SABONET, Pretoria.
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Citation |
| Snijman, D.A., Raimondo, D. & von Staden, L. 2021. Namaquanula bruce-bayeri D.Müll.-Doblies & U.Müll.-Doblies. National Assessment: Red List of South African Plants version . Accessed on 2025/05/17 |
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