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Scientific Name | Dierama tysonii N.E.Br. |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
National Status |
Status and Criteria | Vulnerable B1ab(ii,iii,iv,v) |
Assessment Date | 2015/05/19 |
Assessor(s) | H. Mtshali, C.R. Scott-Shaw & D. Raimondo |
Justification | EOO 2024 km², known from 10 locations, this species has lost habitat to timber plantations and crop farming, and is currently declining mainly due to ongoing habitat degradation due to livestock overgrazing. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Eastern Cape, KwaZulu-Natal |
Range | East Griqualand, between the Ngele and Swartberg Mountains. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Midlands Mistbelt Grassland, Mabela Sandy Grassland, East Griqualand Grassland, Drakensberg Foothill Moist Grassland |
Description | Montane grassland, 1300-1700 m. |
Threats |
| At least 40% of the species' habitat has already been lost to timber plantations and rural settlements. There is ongoing habitat loss and degradation due to livestock overgrazing and commercial crop farming. It is also likely to be threatened by too irregular fires and invasive plants. |
Population |
Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Dierama tysonii N.E.Br. | VU B1ab(ii,iii) | Raimondo et al. (2009) | | Dierama tysonii N.E.Br. | Lower Risk - Least Concern | Scott-Shaw (1999) | | Dierama tysonii N.E.Br. | Rare | Hilton-Taylor (1996) | |
Bibliography |
Hilliard, O.M. and Burtt, B.L. 1991. Dierama: The hairbells of Africa. Acorn Books, Johannesburg and London.
Hilton-Taylor, C. 1996. Red data list of southern African plants. Strelitzia 4. South African National Botanical 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.
Scott-Shaw, C.R. 1999. Rare and threatened plants of KwaZulu-Natal and neighbouring regions. KwaZulu-Natal Nature Conservation Service, Pietermaritzburg.
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Citation |
| Mtshali, H., Scott-Shaw, C.R. & Raimondo, D. 2015. Dierama tysonii N.E.Br. National Assessment: Red List of South African Plants version 2020.1. Accessed on 2023/12/01 |
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