Dierama grandiflorum

Scientific Name
Dierama grandiflorum G.J.Lewis
Higher Classification
National Status
Status and Criteria
Endangered B1ab(iii)
Assessment Date
C. McMaster & L. von Staden
An Eastern Cape endemic (EOO 3444 km²), known from two confirmed locations and possibly still extant at a three other locations where it is known from historical records. It is declining due to ongoing habitat degradation.
South African endemic
Provincial distribution
Eastern Cape
Graaff-Reinet and Somerset East.
Habitat and Ecology
Major system
Major habitats
Amathole Montane Grassland, Karoo Escarpment Grassland
Grass slopes among rock outcrops.
This species is declining due to ongoing habitat degradation as a result of livestock overgrazing. It is possible that a number of subpopulations known from historical records are no locally extinct due to overgrazing, but surveys of these sites are required to confirm this.

An extremely rare and localized endemic known from less than 10 collections. Recent observations of subpopulations on the Bosberg indicate that plants occur in small, sparsely scattered clumps of fewer than 100 plants (C. McMaster pers. obs.). More field surveys are needed to relocate subpopulations known from historical records, but local extinctions are difficult to confirm as plants occur in small, localized stands that are easily overlooked.

Population trend
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Dierama grandiflorum G.J.LewisRare 2011.1
Dierama grandiflorum G.J.LewisRare Raimondo et al. (2009)

Bredenkamp, C. In prep. Conspectus of the flora of the Eastern cape. Strelitzia.

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.

McMaster, C. & von Staden, L. 2016. Dierama grandiflorum G.J.Lewis. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2019/10/15

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Distribution map

© C. McMaster

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