Tylecodon kritzingeri

Taxonomy
Scientific Name
Tylecodon kritzingeri Van Jaarsv.
Higher Classification
Dicotyledons
Family
CRASSULACEAE
National Status
Status and Criteria
Vulnerable D2
Assessment Date
2015/05/12
Assessor(s)
P.V. Bruyns, E.J. van Jaarsveld, L. von Staden & P.C.V. Van Wyk
Justification
A rare, localized species (EOO 189 km²), known from five locations and potentially threatened by habitat degradation due to overgrazing.
Distribution
Endemism
South African endemic
Provincial distribution
Northern Cape
Range
Central mountains of the Richtersveld.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Rosyntjieberg Succulent Shrubland, Central Richtersveld Mountain Shrubland, Stinkfonteinberge Quartzite Fynbos
Description
Sheltered, shaded places among rocks and shrubs on middle to upper slopes.
Threats
In the areas where this species occurs, 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 species dependent on nurse-shrubs elsewhere in the Richtersveld, and could potentially have a negative impact on this species as well.
Population

This species is rarely recorded, but is also easily overlooked (Van Jaarsveld and Koutnik 2004). Subpopulations are small and localized.


Population trend
Stable
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Tylecodon kritzingeri Van Jaarsv.VU D22015.1
Tylecodon kritzingeri Van Jaarsv.Rare Raimondo et al. (2009)
Tylecodon kritzingeri 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.


Tölken, H.R. 1985. Crassulaceae. In: O.A. Leistner (ed). Flora of southern Africa 14,1:1-244. Botanical Research Institute, Pretoria.


Van Jaarsveld, E.J. 1983. Tylecodon kritzingeri: A new Tylecodon (Crassulaceae) from the north western Cape. Journal of South African Botany 49(3):305-309.


Van Jaarsveld, E.J. 1984. Tylecodon kritzingeri. Flowering Plants of Africa 51(1):t. 2006.


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


Williamson, G. 1992. A new species of Tylecodon (Crassulaceae) from Namibia and a new variety from the Richtersveld in South Africa. Aloe 29(3-4):60-63.


Citation
Bruyns, P.V., van Jaarsveld, E.J., von Staden, L. & Van Wyk, P.C.V. 2015. Tylecodon kritzingeri Van Jaarsv. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2018/12/14

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Distribution map

© L. von Staden

© I. Ebrahim


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