Taxonomy
Scientific Name
Schizochilus crenulatus H.P.Linder
Higher Classification
Monocotyledons
Family
ORCHIDACEAE
National Status
Status and Criteria
Vulnerable D2
Assessment Date
2011/09/30
Assessor(s)
L. von Staden, D. McMurtry, L. Grobler & S. Burns
Justification
EOO 84 km², AOO <20 km². A range-restricted habitat specialist potentially threatened by mining.
Distribution
Endemism
South African endemic
Provincial distribution
Mpumalanga
Range
Mariepskop to Graskop.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Northern Escarpment Quartzite Sourveld
Description
Edges of flat Black Reef Quartzite rock flushes, in damp to wet conditions, and often in moss, substrate rarely deeper than 10 mm.
Threats
Habitat loss or degradation as a result of the establishment of timber plantations has probably caused unknown declines in the past. It is however unlikely that the specific habitat of this species - shallow rocky soils at the edges of streams are to be directly transformed by pine plantations, but plantations may result in degradation on the habitat. Mining is a potential threat - a number of mining applications are under review for mining around Graskop. Parts of the habitat of this species which is protected in the provincial Blyde River Canyon Nature Reserve is under land claim (M. Lotter pers. comm.) and it is not certain whether the claimants would preserve the area as a nature reserve.
Population

Subpopulations are generally large, up to 200 plants. However, there are probably very few subpopulations, as the highly specialized habitat only exist at the headwaters of streams. (Linder 1980). However, according to personal observations of Lourens Grobler, this species is plentiful and occurs wherever there is suitable habitat.


Population trend
Stable
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Schizochilus crenulatus H.P.LinderVU D2Raimondo et al. (2009)
Schizochilus crenulatus H.P.LinderLower Risk - Near Threatened Victor (2002)
Schizochilus crenulatus H.P.LinderVulnerable Hilton-Taylor (1996)
Bibliography

Hilton-Taylor, C. 1996. Red data list of southern African plants. Strelitzia 4. South African National Botanical Institute, Pretoria.


Linder, H.P. 1980. An annotated revision of the genus Schizochilus Sond. (Orchidaceae). Journal of South African Botany 46(4):379-434.


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.


Victor, J.E. 2002. South Africa. In: J.S. Golding (ed), Southern African plant Red Data Lists. Southern African Botanical Diversity Network Report 14 (pp. 93-120), SABONET, Pretoria.


Citation
von Staden, L., McMurtry, D., Grobler, L. & Burns, S. 2011. Schizochilus crenulatus H.P.Linder. National Assessment: Red List of South African Plants version . Accessed on 2024/06/21

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Distribution map

© L. Grobler


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