Taxonomy
Scientific Name
Drimia barkerae Oberm. ex J.C.Manning & Goldblatt
Higher Classification
Monocotyledons
Family
HYACINTHACEAE
National Status
Status and Criteria
Endangered B1ab(ii,iii,iv,v)
Assessment Date
2011/10/20
Assessor(s)
R.C. Turner
Justification
Endemic to the flats surrounding Piketberg, between the foot of Piekenierskloof Pass and Redelinghuys (EOO 638 km²). It is known from fewer than five locations and continues to decline due to ongoing agricultural expansion, and livestock grazing. Much of this species' habitat has been irreversibly transformed, and this loss is ongoing.
Distribution
Endemism
South African endemic
Provincial distribution
Western Cape
Range
Redelinghuys to Piketberg and Eendekuil.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Swartland Shale Renosterveld
Description
Shale slopes and shallow, loamy soils fringing fine clays and quartzite pebble fields.
Threats
Almost 90% of the lowlands between Piketberg and the Piekenierskloof Pass are transformed to crop fields, and only small fragments remain. Further north towards Redelinghuys habitat loss to potato and rooibos tea cultivation is rapidly continuing.
Population

Plants are localized to the edges of quartzite patches, but can be locally common in suitable habitat.


Population trend
Decreasing
Conservation
Not currently conserved in any formally protected area.
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Drimia barkerae Oberm. ex J.C.Manning & GoldblattEN B1ab(ii,iii,iv,v)Raimondo et al. (2009)
Bibliography

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.


Goldblatt, P., Manning, J.C. and Snijman, D. 2005. Cape Plants: corrections and additions to the flora. 1. Bothalia 35(1):35-46.


Manning, J.C. and Goldblatt, P. 2003. A new species and new combination in Drimia (Urgineoideae). Bothalia 33(1):109-111.


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
Turner, R.C. 2011. Drimia barkerae Oberm. ex J.C.Manning & Goldblatt. National Assessment: Red List of South African Plants version . Accessed on 2024/05/20

Comment on this assessment Comment on this assessment
Distribution map


Search for images of Drimia barkerae on iNaturalist