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Scientific Name | Pterygodium cleistogamum (Bolus) Schltr. |
Higher Classification | Monocotyledons |
Family | ORCHIDACEAE |
Synonyms | Pterygodium newdigateae Bolus var. cleistogamum Bolus |
National Status |
Status and Criteria | Vulnerable B1ab(ii,iii) |
Assessment Date | 2012/02/07 |
Assessor(s) | L. von Staden |
Justification | EOO 5950 km², known from 10 locations, but only seen at three recently. Experiencing ongoing habitat loss due to coastal development. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Eastern Cape, Western Cape |
Range | Knysna to Grahamstown. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Tsitsikamma Sandstone Fynbos, South Outeniqua Sandstone Fynbos, North Outeniqua Sandstone Fynbos, Suurberg Quartzite Fynbos, Knysna Sand Fynbos |
Description | Fynbos, stony slopes in sandstone derived soils, from sea-level to 340 m. |
Threats |
| Declining along the coast due to habitat destruction, mainly as a result of coastal development (A. Pauw, pers. comm. 2005). |
Population |
Population trend | Decreasing |
Notes |
| Flowering in November and December, fire dependent. |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Pterygodium newdigateae Bolus var. cleistogamum Bolus | VU B1ab(ii,iii) | Raimondo et al. (2009) | | Pterygodium newdigateae Bolus var. cleistogamum Bolus | Lower Risk - Near Threatened | Victor (2002) | | Pterygodium newdigateae Bolus var. cleistogamum Bolus | Rare | 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. and Kurzweil, H. 1999. Orchids of southern Africa. A.A. Balkema, Rotterdam.
Oliver, E.G.H., Liltved, W.R. and Pauw, A. 2008. Pterygodium vermiferum (Coryciinae), a new, autonomously self-pollinating, oil-secreting orchid from the Western Cape of South Africa. South African Journal of Botany 74(4):617-622.
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.
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Citation |
| von Staden, L. 2012. Pterygodium cleistogamum (Bolus) Schltr. National Assessment: Red List of South African Plants version . Accessed on 2025/04/14 |
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