Encephalartos mackenziei 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Cycadopsida Cycadales Zamiaceae

Scientific Name: Encephalartos mackenziei L.E.Newton

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2010
Date Assessed: 2009-10-31
Assessor(s): Donaldson, J.S.
Reviewer(s): Agenbag, L. & Bösenberg, J.D.
Would qualify as Endangered under criteria B1ab+2ab if there was any evidence of decline but the species occurs in a remote part of southern Sudan and there are no confirmed reports of decline in either the extent of habitat or number of individuals. There are alleged reports of plants being removed from the wild, these need  to be investigated, and if found to be correct, the status of this species will need immediate revision.

Geographic Range [top]

Range Description:This species occurs on the Didinga Hills of southern Sudan. Occurs at 1,800 to 2,000 m asl.
Countries occurrence:
South Sudan
Additional data:
Estimated area of occupancy (AOO) - km2:10
Number of Locations:3
Lower elevation limit (metres):1800
Upper elevation limit (metres):2000
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The populations are poorly known. Heibloem (1999) states that the population in the Didinga hills is quite large but gives no numbers.
Current Population Trend:Stable
Additional data:
Number of mature individuals:500-2000
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This species occurs in seasonally dry open woodland on stony country.
Generation Length (years):70

Threats [top]

Major Threat(s): There are reports of large numbers of plants being removed from the wild by collectors (allegedly "truck-loads").

Conservation Actions [top]

Conservation Actions: This species is listed on Appendix I of the CITES Appendices.

Classifications [top]

2. Savanna -> 2.1. Savanna - Dry
0. Root -> 6. Rocky areas (eg. inland cliffs, mountain peaks)
1. Land/water protection -> 1.1. Site/area protection
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:No
In-Place Species Management
In-Place Education
  Included in international legislation:Yes
  Subject to any international management/trade controls:Yes
2. Agriculture & aquaculture -> 2.3. Livestock farming & ranching -> 2.3.4. Scale Unknown/Unrecorded
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

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

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 : ✓ 

Bibliography [top]

Goode, D. 1989. Cycads of Africa. Struik Winchester, Cape Town.

Goode, D. 2001. Cycads of Africa. D & E Cycads of Africa, Gallo Manor, Johannesburg, South Africa.

Heibloem, P. 1999. Cycads of Central Africa. Publication Fund, Palm & Cycad Societies of Australia, Brisbane.

Hill, K.D. and Stevenson, D.W. 1998-2006. The Cycad Pages. Available at:

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

Newton, L.E. 2002. A new species of Encephalartos (Zamiaceae) in Sudan. Botanical Journal of the Linnean Society 140: 187-192.

Citation: Donaldson, J.S. 2010. Encephalartos mackenziei. The IUCN Red List of Threatened Species 2010: e.T178878A7633636. . Downloaded on 22 September 2018.
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