Taxonomy
Scientific Name
Disa tysonii Bolus
Higher Classification
Monocotyledons
Family
ORCHIDACEAE
National Status
Status and Criteria
Rare
Assessment Date
2006/11/06
Assessor(s)
J.E. Victor & C.R. Scott-Shaw
Justification
A widespread, but rare and localized species, known from only a few small subpopulations, but not suspected to be declining.
Distribution
Endemism
Not endemic to South Africa
Provincial distribution
Eastern Cape, KwaZulu-Natal
Range
Underberg, Tsehlanyana Valley (Lesotho), Hogsback, Dohne Peak and Port St Johns.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Drakensberg Foothill Moist Grassland, Lesotho Highland Basalt Grassland, Southern Drakensberg Highland Grassland, Amathole Mistbelt Grassland, Amathole Montane Grassland, Pondoland-Ugu Sandstone Coastal Sourveld
Description
Damp, rocky grasslands, 100-3000 m.
Threats
Forestry in the Hogsback area occurs in small patches, it may not pose an immediate threat and most populations are likely to be safe.
Population
Population trend
Stable
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Disa tysonii BolusRare Raimondo et al. (2009)
Disa tysonii BolusLower Risk - Least Concern Victor (2002)
Disa tysonii BolusLower Risk - Least Concern Scott-Shaw (1999)
Disa tysonii BolusRare Hilton-Taylor (1996)
Disa tysonii BolusRare Hall et al. (1980)
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.


Hall, A.V., De Winter, M., De Winter, B. and Van Oosterhout, S.A.M. 1980. Threatened plants of southern Africa. South African National Scienctific Programmes Report 45. CSIR, Pretoria.


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


Liltved, W.R. and Johnson, S.D. Unpublished.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.


Pooley, E. 2003. Mountain flowers: a field guide to the flora of the Drakensberg and Lesotho. Natal Flora Publications Trust, Durban.


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.


Scott-Shaw, C.R. 1999. Rare and threatened plants of KwaZulu-Natal and neighbouring regions. KwaZulu-Natal Nature Conservation Service, Pietermaritzburg.


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
Victor, J.E. & Scott-Shaw, C.R. 2006. Disa tysonii Bolus. National Assessment: Red List of South African Plants version . Accessed on 2025/04/14

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