Taxonomy
Scientific Name
Othonna herrei Pillans
Higher Classification
Dicotyledons
Family
ASTERACEAE
National Status
Status and Criteria
Vulnerable D2
Assessment Date
2015/05/19
Assessor(s)
D. Raimondo, D.A. Kamundi & L. von Staden
Justification
A rare, localized habitat specialist (EOO 517 km²), known from four locations and potentially threatened by collecting of mature individuals from the wild for the succulent trade.
Distribution
Endemism
South African endemic
Provincial distribution
Northern Cape
Range
Richtersveld.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Kosiesberg Succulent Shrubland, Central Richtersveld Mountain Shrubland
Description
Sheltered below rocks on south and southeast-facing rocky mountain slopes.
Threats
This species occurs mainly on the central mountain ranges of the Richtersveld, where grazing pressure is currently low. Its preference for sheltered rocky crevices offers it some protection from the effects of trampling, and this species is not grazed (Craib 1997). It is unlikely to become threatened, even if grazing pressure increases. This species is popular in cultivation, and is potentially threatened by collectors removing mature individuals from the wild, for sale in the specialist succulent trade.
Population

This species occurs as scattered, small subpopulations (Craib 1997).


Population trend
Stable
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Othonna herrei PillansVU D22015.1
Othonna herrei PillansRare Raimondo et al. (2009)
Bibliography

Craib, C. 1997. Othonna euphorbioides, O. herrei and O. lepidocaulis: Their natural history and propagation. British Cactus and Succulent Journal 15(1):41-47.


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.


Rowley, G.D. 1994. Succulent Compositae. Strawberry Press, California.


Snijman, D.A. 2013. Plants of the Greater Cape Floristic Region 2: The extra Cape flora. Strelitzia 30. South African National Biodiversity Institute, Pretoria.


Citation
Raimondo, D., Kamundi, D.A. & von Staden, L. 2015. Othonna herrei Pillans. National Assessment: Red List of South African Plants version 2020.1. Accessed on 2022/05/24

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Distribution map

© P.C.V. van Wyk


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