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Scientific Name | Dierama nebrownii Hilliard |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
National Status |
Status and Criteria | Near Threatened B1ab(iii) |
Assessment Date | 2018/10/01 |
Assessor(s) | L. von Staden |
Justification | Dierama nebrownii is a range-restricted species with an extent of occurrence (EOO) of 3827 km². It is declining due to ongoing habitat loss and degradation across its range, but more than 10 locations are estimated to remain. It therefore nearly meets the criteria thresholds for Vulnerable under criterion B. It is listed as Near Threatened. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Mpumalanga |
Range | This species is endemic to the Mpumalanga Highveld of South Africa, where it occurs from Lydenburg to Belfast and Kaapse Hoop. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Steenkampsberg Montane Grassland, Lydenburg Thornveld, Northern Escarpment Quartzite Sourveld, KaNgwane Montane Grassland, Long Tom Pass Montane Grassland, Northern Escarpment Dolomite Grassland |
Description | It occurs on stony slopes in grassland. |
Threats |
| Dierama nebrownii has lost about 30% of its habitat to timber plantations, and loss continues around Badplaas and Machadodorp. It is also threatened by competition from alien invasive plants as well as overgrazing in parts of its range. |
Population |
There are very few recent observations of this species. It requires field surveys and monitoring to determine the impacts of habitat degradation on the population. It is suspected to be declining due to ongoing habitat loss.
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Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Dierama nebrownii Hilliard | NT B1ab(iii) | 2020.1 | | Dierama nebrownii Hilliard | Least Concern | Raimondo et al. (2009) | |
Bibliography |
Hilliard, O.M. and Burtt, B.L. 1991. Dierama: The hairbells of Africa. Acorn Books, Johannesburg and London.
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.
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Citation |
| von Staden, L. 2018. Dierama nebrownii Hilliard. National Assessment: Red List of South African Plants version . Accessed on 2025/04/14 |
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