Taxonomy
Scientific Name
Lachenalia valeriae G.D.Duncan
Higher Classification
Monocotyledons
Family
HYACINTHACEAE
National Status
Status and Criteria
Vulnerable B1ab(iii)
Assessment Date
2019/03/19
Assessor(s)
L. von Staden
Justification
Lachenalia valeriae has a restricted distribution range, with an extent of occurrence (EOO) of 4275 km². It is known from six to eight locations, and is declining due to mining and overgrazing.
Distribution
Endemism
South African endemic
Provincial distribution
Northern Cape
Range
This species is endemic to Namaqualand, where it occurs from the central Richtersveld to Hondeklipbaai.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Namaqualand Inland Duneveld, Namaqualand Strandveld, Oograbies Plains Sandy Grassland, Richtersveld Red Duneveld, Southern Richtersveld Yellow Duneveld, Namaqualand Arid Grassland, Namaqualand Sand Fynbos
Description
It occurs in deep red sand on coastal plains, rarely in sandy pockets of granite outcrops or crevices in shale rock slabs.
Threats
Lachenalia valeriae is threatened by overgrazing of communal rangelands in the Richtersveld (P.C.V. van Wyk pers. comm., N. Jurgens s.n. specimen notes). The impact of grazing on subpopulations elsewhere in Namaqualand is not known. The subpopulation at Kleinsee is threatened by ongoing habitat loss to mining, as well as another one near the mouth of the Holgat River between Port Nolloth and Alexander Bay where the species was last recorded in the 1970s.
Population

This species is common in the Namaqua National Park, where large subpopulations of up to 500 plants have been recorded. Elsewhere in its range abundance is not known. It is currently known from six to eight locations, and is declining at four of these.


Population trend
Decreasing
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Lachenalia valeriae G.D.DuncanRare Raimondo et al. (2009)
Bibliography

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


Duncan, G.D. and Edwards, T.J. 2002. Hyacinthaceae: Massonieae. A new species of Lachenalia from Namaqualand, South Africa. Bothalia 32(2):190-192.


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
von Staden, L. 2019. Lachenalia valeriae G.D.Duncan. National Assessment: Red List of South African Plants version 2020.1. Accessed on 2020/08/11

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Distribution map


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