Monadenia atrorubens (Schltr.) Rolfe, Monadenia ophrydea in sense of Kraenzl. (1900) (in part)
National Status
Status and Criteria
Near Threatened B1ab(iii)
Assessment Date
2012/08/31
Assessor(s)
L. von Staden, B. Bytebier, W.R. Liltved, E.G.H. Oliver, T.A. Oliver & D. Raimondo
Justification
EOO 16 116 km², known to be extant at ± 10 locations, however this is a cryptic species flowering only after fire, and is therefore likely to be under-collected. There is a continuing decline due to crop cultivation, urban expansion and encroachment by invasive alien plants.
Distribution
Endemism
South African endemic
Provincial distribution
Northern Cape, Western Cape
Range
Cape Peninsula and Cape Hangklip to Nieuwoudtville.
Seasonally wet areas on sandy flats, sea level to 1000 m.
Threats
Alien invasive wattles threaten lowland subpopulations around Pella and Mamre and the subpopulations at Betty's Bay. Agriculture has probably led to decline of populations around Clanwilliam and Nieuwoudtville. Urban expansion has led to past declines in and around Cape Town.
Population
Population trend
Decreasing
Notes
Flowers after fires. This species is easily confused with D. ophrydea (Linder 1981).
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Disa atrorubens Schltr.
VU B1ab(iii)
2012.1
Disa atrorubens Schltr.
VU B1ab(iii)
Raimondo et al. (2009)
Bibliography
Liltved, W.R. and Johnson, S.D. Unpublished. The Cape Orchids - Wild orchids of the Cape Floral Kingdom.
Linder, H.P. 1981. Taxonomic studies in the Disinae. V. A revision of the genus Monadenia. Bothalia 13(3&4):339-363.
Linder, H.P. and Kurzweil, H. 1999. Orchids of southern Africa. A.A. Balkema, Rotterdam.
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., Bytebier, B., Liltved, W.R., Oliver, E.G.H., Oliver, T.A. & Raimondo, D. 2012. Disa atrorubens Schltr. National Assessment: Red List of South African Plants version . Accessed on 2025/04/18
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