Drosanthemum crassum

Taxonomy
Scientific Name
Drosanthemum crassum L.Bolus
Higher Classification
Dicotyledons
Family
AIZOACEAE
National Status
Status and Criteria
Near Threatened B1ab(i,ii,iii,iv,v)
Assessment Date
2015/12/14
Assessor(s)
L. von Staden
Justification
EOO 8391 km², this species is still fairly common, but declining across its range due to habitat loss and overgrazing. It is estimated to occur at between 10 and 15 locations.
Distribution
Endemism
South African endemic
Provincial distribution
Western Cape
Range
Tanqua Karoo to Little Karoo.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Succulent Karoo
Description
Karroid scrub in loamy sand.
Threats
Threatened by habitat loss to agricultural expansion (mainly vineyards and orchards) around Calitzdorp, Barrydale and Oudtshoorn, where loamy alluvial soils on floodplains are extensively cultivated. It is also threatened by overgrazing across its range, as most areas in the Little Karoo are affected by overgrazing.
Population

This species is abundant in loamy soils in Apronveld and Gannaveld. Plants are highly palatable, and its presence indicates areas where grazing is well managed (Vlok and Schutte-Vlok 2010).


Population trend
Decreasing
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Drosanthemum crassum L.BolusThreatened 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.


Manning, J.C. and Goldblatt, P. 2012. Plants of the Greater Cape Floristic Region 1: The Core Cape Flora. Strelitzia 29. South African National Biodiversity 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.


Vlok, J. and Schutte-Vlok, A.L. 2010. Plants of the Klein Karoo. Umdaus Press, Hatfield.


Citation
von Staden, L. 2015. Drosanthemum crassum L.Bolus. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2017/12/14

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Distribution map

© J.H. Vlok/A.L. Schutte-Vlok

© J.H. Vlok/A.L. Schutte-Vlok


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