Lachenalia arbuthnotiae

Taxonomy
Scientific Name
Lachenalia arbuthnotiae W.F.Barker
Higher Classification
Monocotyledons
Family
HYACINTHACEAE
National Status
Status and Criteria
Critically Endangered B2ab(ii,iii,iv,v)
Assessment Date
2016/09/14
Assessor(s)
D. Raimondo, G.D. Duncan, L. von Staden & C. Dorse
Justification
AOO <10 km², two, possibly three, small, severely fragmented subpopulations remain after extensive habitat loss to urban expansion, and continue to decline due to ongoing habitat loss and degradation.
Distribution
Endemism
South African endemic
Provincial distribution
Western Cape
Range
Cape Flats.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Cape Flats Sand Fynbos, Cape Flats Dune Strandveld, Swartland Granite Renosterveld
Description
Seasonally waterlogged depressions at the edge of wetlands in Cape Flats Sand Fynbos.
Threats
This species has lost more than 90% of its habitat to urban expansion, and only a few critically small fragments remain. These continue to be degraded predominantly due to increasingly dense infestations of alien invasive plants, as well as disruptions of water flow to wetlands, and water pollution, leading to eutrophication and disturbance of native species dynamics.
Population

This species remains on two small, isolated fragments on the Cape Flats. One subpopulation, last surveyed in 2006 consists of about 60 plants, and the second subpopulation, discovered in 2016 after a fire consists of at least 500 plants. A third subpopulation possibly still exists around Cape Town International Airport (Duncan 2012), but has not been surveyed in a very long time.


Population trend
Decreasing
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Lachenalia arbuthnotiae W.F.BarkerCR B2ab(ii,iii,iv,v)Raimondo et al. (2009)
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.


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.


Manning, J., Goldblatt, P. and Snijman, D. 2002. The color encyclopedia of Cape bulbs. Timber Press, Portland/Cambridge.


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
Raimondo, D., Duncan, G.D., von Staden, L. & Dorse, C. 2016. Lachenalia arbuthnotiae W.F.Barker. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2019/05/27

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Distribution map

© C. Dorse

© C. Dorse

© C. Dorse

© C. Dorse

© C. Dorse

© C. Dorse

© I. Ebrahim


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