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Scientific Name | Hessea mathewsii W.F.Barker |
Higher Classification | Monocotyledons |
Family | AMARYLLIDACEAE |
Synonyms | Dewinterella mathewsii (W.F.Barker) D.& U.Müll.-Doblies, Gemmaria mathewsii (W.F.Barker) D.& U.Müll.-Doblies |
National Status |
Status and Criteria | Critically Endangered B1ab(iii,v)+2ab(iii,v) |
Assessment Date | 2015/09/20 |
Assessor(s) | D.A. Snijman, D. Raimondo & L. von Staden |
Justification | A highly range-restricted species (EOO 30 km²), found exclusively in damp depressions (AOO <10 km²). Known from four severely fragmented subpopulations and declining due to ongoing habitat loss and degradation. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | Vredenburg and Langebaanweg. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Langebaan Dune Strandveld, Saldanha Flats Strandveld, Saldanha Granite Strandveld |
Description | Coastal forelands near granite rocks or limestone outcrops in damp depressions. |
Threats |
| Most of this species' habitat has been transformed for crop cultivation. Plants on remaining fragments are threatened by overgrazing and further habitat loss to urban expansion. |
Population |
Recent field surveys indicate that four subpopulations remain on isolated fragments of remaining habitat on the Vredenburg Peninsula. Two subpopulations consist of between 50 and 100 plants, and two have less than 500 plants. The population size is therefore estimated to number fewer than 1500 mature individuals, and continue to decline due to ongoing habitat loss and degradation.
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Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Hessea mathewsii W.F.Barker | CR B1ab(i,ii,iii)+2ab(i,ii,iii) | Raimondo et al. (2009) | | Hessea mathewsii W.F.Barker | EN B1B2abc | Victor (2002) | | Hessea mathewsii W.F.Barker | Endangered | Hilton-Taylor (1996) | | Hessea mathewsii W.F.Barker | Vulnerable | Hall et al. (1980) | |
Bibliography |
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.
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.
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.
Snijman, D.A. 1994. Systematics of Hessea, Strumaria and Carpolyza (Amaryllideae: Amaryllidaceae). Contributions from the Bolus Herbarium 16:1-162.
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. 2015. Hessea mathewsii W.F.Barker. National Assessment: Red List of South African Plants version . Accessed on 2025/05/10 |
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