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Scientific Name | Bijlia dilatata H.E.K.Hartmann |
Higher Classification | Dicotyledons |
Family | AIZOACEAE |
Synonyms | Bijlia cana N.E.Br., Bolusanthemum tugwelliae (L.Bolus) Schwantes, Hereroa cana L.Bolus, Hereroa tugwelliae in sense of L.Bolus (1927, 1928), not of L.Bolus(1930) |
Common Names | Clay Prince Albert Vygie (e) |
National Status |
Status and Criteria | Endangered B1ab(iii,v)+2ab(iii,v) |
Assessment Date | 2015/12/13 |
Assessor(s) | S.J. Milton & L. von Staden |
Justification | A range-restricted species (EOO 260 km²), occurring at three to five locations and declining due to ongoing habitat loss and degradation. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | Prince Albert. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Prince Albert Succulent Karoo, Swartberg Shale Renosterveld, Southern Karoo Riviere |
Description | Flat areas covered by decomposed dolerite and quartzitic pebbles. |
Threats |
| This species is predominantly threatened by grazing. Field studies have shown a 75% decrease in plant density in grazed areas, and that plant density remains low even after areas have been left ungrazed for 15 years (S.J. Milton, unpublished data). This species relies on nurse-effects of larger shrubs to survive and reproduce, and in areas where overgrazing has reduced shrub cover, plants in exposed localities die off in years of drought. Road construction, borrow pits, erosion and urban expansion are also causing ongoing habitat loss around Prince Albert. |
Population |
This species is declining across its range due to habitat loss and degradation, except for a 120 ha private nature reserve established to protect part of the population.
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Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Bijlia dilatata H.E.K.Hartmann | EN B1ab(iii,v)+2ab(iii,v) | 2017.1 | | Bijlia dilatata H.E.K.Hartmann | Least Concern | Raimondo et al. (2009) | |
Bibliography |
Hartmann, H.E.K. 1992. A new name for Bijlia cana (Mesembryanthema). Cactus and Succulent Journal (USA) 64(4):173-180.
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. 2013. Plants of the Greater Cape Floristic Region 2: The extra Cape flora. Strelitzia 30. South African National Biodiversity Institute, Pretoria.
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Citation |
| Milton, S.J. & von Staden, L. 2015. Bijlia dilatata H.E.K.Hartmann. National Assessment: Red List of South African Plants version . Accessed on 2025/05/31 |
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