Tylecodon bayeri

Taxonomy
Scientific Name
Tylecodon bayeri Van Jaarsv.
Higher Classification
Dicotyledons
Family
CRASSULACEAE
National Status
Status and Criteria
Vulnerable D2
Assessment Date
2015/05/12
Assessor(s)
E.J. van Jaarsveld & L. von Staden
Justification
A localized species (EOO 424 km²), known from five locations and potentially threatened by habitat degradation due to overgrazing.
Distribution
Endemism
South African endemic
Provincial distribution
Northern Cape
Range
Richtersveld, mountains between Eksteenfontein and Steinkopf.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Southern Richtersveld Inselberg Shrubland, Kosiesberg Succulent Shrubland, Kahams Mountain Desert
Description
Sheltered among rocks and shrubs on south-facing slopes.
Threats
This species occurs in montane areas where the grazing pressure is currently low. However, as rangelands on the plains and closer to settlements are becoming increasingly degraded, herders are starting to move into montane areas in search of better grazing for their livestock. Severe overgrazing has caused a loss of vegetation cover and a decline in succulents dependent on nurse-shrubs elsewhere in the Richtersveld, and could potentially have a negative impact on this species as well.
Population

This species is known from only a few records, but is easily overlooked, and fairly common within suitable habitat (E.J. van Jaarsveld pers. comm.).


Population trend
Stable
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Tylecodon bayeri Van Jaarsv.VU D22015.1
Tylecodon bayeri Van Jaarsv.Least Concern Raimondo et al. (2009)
Tylecodon bayeri Van Jaarsv.Rare Hilton-Taylor (1996)
Bibliography

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.


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


Van Jaarsveld, E. 1988. Tylecodon bayeri (Crassulaceae), a new species from the north western Cape. Aloe 25(2):30-32.


Van Jaarsveld, E.J. and Koutnik, D. 2004. Cotyledon and Tylecodon. Umdaus Press, Pretoria.


Citation
van Jaarsveld, E.J. & von Staden, L. 2015. Tylecodon bayeri Van Jaarsv. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2019/05/27

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Distribution map


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