Lachenalia nordenstamii

Taxonomy
Scientific Name
Lachenalia nordenstamii W.F.Barker
Higher Classification
Monocotyledons
Family
HYACINTHACEAE
National Status
Status and Criteria
Critically Endangered B1ab(iii,v)+2ab(iii,v)
Assessment Date
2015/08/11
Assessor(s)
G.D. Duncan, D. Raimondo & P.C.V. Van Wyk
Justification
A highly localized habitat specialist (EOO in South Africa <1 km²), which is declining at one known location due to ongoing habitat degradation as a result of overgrazing.
Distribution
Endemism
Not endemic to South Africa
Provincial distribution
Northern Cape
Range
Richtersveld and south-western Namibia.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Central Richtersveld Mountain Shrubland
Description
Rocky south- and west-facing dolomitic hills and mountain slopes.
Threats
At one known location in South Africa, plants are threatened by ongoing habitat degradation due to severe overstocking of livestock, which has led to a loss of shrub cover and species diversity, particularly on the lower slopes of Numees Mountain, but also increasingly on the upper slopes. Exposure of bare soil due to trampling is leading to erosion, which is causing a decline even in species that are not grazed. This species is not threatened in Namibia.
Population

Plants occur as single individuals or in scattered, small clumps. In South Africa it is known from a single subpopulation, which is declining due to overgrazing. It is also rare and localized in southern Namibia (Loots 2005), but the Namibian population is stable. The South African population is isolated from Namibia, and unlikely to benefit from significant rescue effects from the Namibian population.


Population trend
Decreasing
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Lachenalia nordenstamii W.F.BarkerCR B1ab(iii,v)+2ab(iii,v)2015.1
Lachenalia nordenstamii W.F.BarkerRare Raimondo et al. (2009)
Lachenalia nordenstamii W.F.BarkerRare Hilton-Taylor (1996)
Bibliography

Duncan, G.D. 1988. Lachenalia handbook. Annals of Kirstenbosch Botanic Garden 17:1-71.


Duncan, G.D. 2012. The genus Lachenalia. Kew Publishing, Royal Botanic Gardens, Kew.


Hilton-Taylor, C. 1996. Red data list of southern African plants. Strelitzia 4. South African National Botanical Institute, Pretoria.


Loots, S. 2005. Red Data Book of Namibian plants. Southern African Botanical Diversity Network Report 38. SABONET, Pretoria and Windhoek.


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.


Citation
Duncan, G.D., Raimondo, D. & Van Wyk, P.C.V. 2015. Lachenalia nordenstamii W.F.Barker. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2019/08/22

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Distribution map


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