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Scientific Name | Lachenalia thomasiae W.F.Barker ex G.D.Duncan |
Higher Classification | Monocotyledons |
Family | HYACINTHACEAE |
National Status |
Status and Criteria | Vulnerable D2 |
Assessment Date | 2019/11/27 |
Assessor(s) | L. von Staden & D. Raimondo |
Justification | Lachenalia thomasiae is a rare and range-restricted species with an extent of occurrence (EOO) of 15 km², and an area of occupancy (AOO) of 12 km². It is known from three locations, and is potentially threatened by habitat loss to agriculture and infrastructure development. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | This species is localized to the Olifants River Valley south of Clanwilliam in the Western Cape. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Citrusdal Vygieveld, Olifants Sandstone Fynbos, Graafwater Sandstone Fynbos |
Description | It occurs on rocky sandstone slopes and ridges in fynbos and succulent karoo. |
Threats |
| There has been past expansion of fruit orchards at two of the three known locations. This species' habitat is only marginally suited to cultivation, and there is only sporadic expansion of agriculture. One subpopulation was recorded near a holiday resort, where it is potentially threatened by habitat loss to further infrastructure development. Alien invasive grasses are also present within its habitat (Duncan 2012). |
Population |
This species is rare and poorly known. Three subpopulations have been recorded thus far, but it is possible that more exist. The population is not currently suspected to be declining, but it could rapidly increase its risk of extinction, should any further habitat loss occur.
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Population trend | Stable |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Lachenalia thomasiae W.F.Barker ex G.D.Duncan | VU D2 | Raimondo et al. (2009) | | Lachenalia thomasiae W.F.Barker ex G.D.Duncan | Rare | Hilton-Taylor (1996) | |
Bibliography |
Duncan, G.D. 2012. The genus Lachenalia. Kew Publishing, Royal Botanic Gardens, Kew.
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.
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.
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Citation |
| von Staden, L. & Raimondo, D. 2019. Lachenalia thomasiae W.F.Barker ex G.D.Duncan. National Assessment: Red List of South African Plants version . Accessed on 2025/05/09 |
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