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Scientific Name | Manulea minor Diels |
Higher Classification | Dicotyledons |
Family | SCROPHULARIACEAE |
National Status |
Status and Criteria | Critically Endangered B1ab(iii)+2ab(iii) |
Assessment Date | 2021/10/21 |
Assessor(s) | L. von Staden, D. Raimondo & G. Nicolson |
Justification | A highly range-restricted species with an extent of occurrence (EOO) of 7 km². Most of the natural vegetation within its known range has been irreversibly modified. It was assessed as Critically Endangered Possibly Extinct in 2018 based on the last collection of it having been made in 1944. In 2021 it was recorded during an Environmental Impact Assessment for an agricultural crop application on the only remaining remant of lowland vegetation within the Hex River Valley. Given ongoing pressure to transform this species' habitat for crops it is listed as Critically Endangered under criterion B. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | This species is endemic to the Westerna Cape, South Africa, and is found in the Hex River Valley. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Breede Alluvium Fynbos |
Description | It occurs in sandy flats and lower slopes. |
Threats |
| Based on altitude notes on specimens it appears that this species is restricted to lower slopes and flats. These areas within the Hex River Valley has been extensively converted to vineyards, as well as lost to urban expansion around De Doorns. It does not occur in disturbed areas and currently remains in the only lowland remnant remaining in the valley. There is ongoing pressure to convert this last remaining natural lowland remnant to vines. In addition surrounding farming practises are causing slow habitat degradation to the edges of the fragment. |
Population |
The only remaining population consists of between 500 and 1000 plants it occurs as scattered clumps between shrubs.
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Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Manulea minor Diels | CR PE | 2020.1 | | Manulea minor Diels | Data Deficient | Raimondo et al. (2009) | | Manulea minor Diels | Insufficiently Known | Hilton-Taylor (1996) | |
Bibliography |
Goldblatt, P. and Manning, J.C. 2000. Cape Plants: A conspectus of the Cape Flora of South Africa. Strelitzia 9. National Botanical Institute, Cape Town.
Hilliard, O.M. 1994. The Manuleae: a tribe of Scrophulariaceae. Edinburgh University Press, Edinburgh.
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.
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Citation |
| von Staden, L., Raimondo, D. & Nicolson, G. 2021. Manulea minor Diels. National Assessment: Red List of South African Plants version . Accessed on 2024/12/03 |
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