Encephalartos dolomiticus 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Cycadopsida Cycadales Zamiaceae

Scientific Name: Encephalartos dolomiticus Lavranos & D.L.Goode
Common Name(s):
English Wolkberg Cycad
Encephalartos verrucosus Robbertse, Vorster & S.van der Westhuizen

Assessment Information [top]

Red List Category & Criteria: Critically Endangered A2d; C1 ver 3.1
Year Published: 2010
Date Assessed: 2009-10-31
Assessor(s): Donaldson, J.S.
Reviewer(s): Agenbag, L. & Bösenberg, J.D.
Based on numbers in collections and ongoing decline in the wild, it is estimated that >80% of the plants have been removed from the wild in the past 90 years (three generations). The small overall population size and ongoing decline of ca. 30% over the next 30 years (one generation). Meeting both these requirements means that this species qualifies for listing as Critically Endangered under criteria A2 and C1.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species occurs near Penge in the Drakensberg in southeastern Limpopo Province, South Africa. Recorded from 1,100 to 1,500 m asl.
Countries occurrence:
South Africa (Limpopo Province)
Additional data:
Estimated area of occupancy (AOO) - km2:30
Number of Locations:10
Lower elevation limit (metres):1100
Upper elevation limit (metres):1500
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:158 plants were counted in helicopter surveys in 1993 and 151 plants in 2004. The latter included 17 newly discovered plants and implies a decline from 158 to 134 plants for the remainder (9% decline over 10 years).
Current Population Trend:Decreasing
Additional data:
Number of mature individuals:151
Population severely fragmented:Yes

Habitat and Ecology [top]

Habitat and Ecology:This species occurs on grassland on shallow soils over dolomite ridges.
Generation Length (years):70

Threats [top]

Major Threat(s): Illegal collection from wild populations has had a drastic effect on the number of plants in the wild. This may prevent reproduction from taking place.

Conservation Actions [top]

Conservation Actions: This species is listed on Appendix I of the CITES Appendices. This species possibly occurs in the Legalameetse Nature Reserve.

Classifications [top]

4. Grassland -> 4.5. Grassland - Subtropical/Tropical Dry
0. Root -> 6. Rocky areas (eg. inland cliffs, mountain peaks)
1. Land/water protection -> 1.1. Site/area protection
2. Land/water management -> 2.1. Site/area management
4. Education & awareness -> 4.3. Awareness & communications

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
  Occur in at least one PA:Unknown
In-Place Species Management
In-Place Education
  Included in international legislation:Yes
  Subject to any international management/trade controls:Yes
5. Biological resource use -> 5.2. Gathering terrestrial plants -> 5.2.1. Intentional use (species is the target)
♦ timing:Ongoing    
→ Stresses
  • 2. Species Stresses -> 2.1. Species mortality
  • 2. Species Stresses -> 2.3. Indirect species effects -> 2.3.8. Other

1. Research -> 1.2. Population size, distribution & trends
1. Research -> 1.3. Life history & ecology
1. Research -> 1.6. Actions
3. Monitoring -> 3.1. Population trends

♦  Pets/display animals, horticulture
 National : ✓  International : ✓ 

♦  Establishing ex-situ production *

Bibliography [top]

IUCN. 2010. IUCN Red List of Threatened Species (ver. 2010.3). Available at: (Accessed: 2 September 2010).

Robbertse, P.J., Vorster, P. and van der Westhuizen, S. 1988. Encephalartos verrucosus (Zamiaceae): a new species from the north-eastern Transvaal. South African Journal of Botany 54(5): 487-490.

Vorster, P. 1992. Focus on Encephalartos dolomiticus. Encephalartos 30: 3-7.

Citation: Donaldson, J.S. 2010. Encephalartos dolomiticus. The IUCN Red List of Threatened Species 2010: e.T41885A10568132. . Downloaded on 19 September 2018.
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