Taxonomy
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.
Distribution
Endemism
South African endemic
Provincial distribution
Mpumalanga
Range
This species is endemic to the Mpumalanga Highveld, 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
This species 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.


Population trend
Decreasing
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Dierama nebrownii HilliardLeast 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.


Citation
von Staden, L. 2018. Dierama nebrownii Hilliard. National Assessment: Red List of South African Plants version 2020.1. Accessed on 2020/10/20

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Distribution map


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