|Scientific Name:||Encephalartos dyerianus Lavranos & D.L.Goode|
Encephalartos graniticolus Robbertse, Vorster & S.van der Westhuizen
|Red List Category & Criteria:||Critically Endangered B1ab(v)+2ab(v) ver 3.1|
|Reviewer(s):||Agenbag, L. & Bösenberg, J.D.|
Known from a single locality. Although now included in a reserve, collecting is still taking place (107 plants were illegally removed in January 2008). Other cycad species in the vicinity have been decimated by collectors. It therefore qualifies as Critically Endangered as it has a very small extent of occurrence and area of occupancy (both about 0.3 km²) and there is continuing decline in numbers of mature plants.
|Previously published Red List assessments:|
|Range Description:||This species is known from a single granite mountain in Limpopo Province, South Africa. Occurs at an altitude of 700 m.|
Native:South Africa (Limpopo Province)
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||The population size of E. dyerianus was originally estimated as approximately 600 mature individuals but 107 plants were illegally removed in January 2008.|
|Current Population Trend:||Decreasing|
|Habitat and Ecology:||The plants grow in open shrubland and grassland on slopes of a single low granite hill. The surrounding area consists of plains covered with mopane trees (Colophospermum mopane).|
|Generation Length (years):||70|
|Major Threat(s):||Reproductive failure may occur if more mature individuals are removed from the population.|
|Conservation Actions:||This species is listed on Appendix I of the CITES Appendices. The low granite hill falls within the Lillie Flora Reserve. This reserve in turn falls within the boundaries of the privately owned Selati Game Reserve.|
IUCN. 2010. IUCN Red List of Threatened Species (ver. 2010.3). Available at: http://www.iucnredlist.org. (Accessed: 2 September 2010).
Robbertse, P.J., Vorster, P. and van der Westhuizen, S. 1988. Encephalartos graniticolus (Zamiaceae): a new species from the nort-eastern Transvaal. South African Journal of Botany 54(4): 363-366.
Vorster, P. 1992. Focus on Encephalartos dyerianus. Encephalartos 29: 3-7.
|Citation:||Donaldson, J.S. 2010. Encephalartos dyerianus. The IUCN Red List of Threatened Species 2010: e.T41886A10568593.Downloaded on 20 January 2018.|