Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Urticales Moraceae

Scientific Name: Dorstenia tenuiradiata
Species Authority: Mildbr.

Assessment Information [top]

Red List Category & Criteria: Vulnerable B2ab(iii) ver 3.1
Year Published: 2013
Date Assessed: 2012-04-24
Assessor(s): IUCN SSC East African Plants Red List Authority
Reviewer(s): Hilton-Taylor, C.
Contributor(s): Bangirinama, F., Beentje, H.J., Bujo, F., Gereau, R., Kabuye, C., Kalema, J., Kelbessa, E., Kimeu, J.M., Luke, Q., Malombe, I., Manoko, L.M., Maunder, M., Minani, V., Mwachala, G., Mwangoka, M., Ndangalasi, H. & Sado, H.
Facilitator/Compiler(s): Rodrigues, A.
This species has an area of occupancy of 179.741 km2 and is found in 10 locations where the threat is from invasive species, hydroelectric projects and habitat conversion for agriculture. There is a continuing decline the quality and extent of habitat of this species.

Geographic Range [top]

Range Description: Found in the Taita Hills, Kenya and the Uluguru, Nguru and Udzungwa Mountains and the Mahembe and Mufindi Scarps, Tanzania.  Last collected in 2007.
Countries occurrence:
Kenya; Tanzania, United Republic of
Estimated area of occupancy (AOO) - km2: 179.741
Number of Locations: 10
Lower elevation limit (metres): 100
Upper elevation limit (metres): 1840
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: No population size estimates are available for this species.
Current Population Trend: Decreasing
Additional data:
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: A succulent herb growing to 1m.  Found in rocky areas of moist woodland or forest.  Also found on inselbergs and in riverine and sub-montane forest.
Systems: Terrestrial
Continuing decline in area, extent and/or quality of habitat: Yes

Threats [top]

Major Threat(s): There has been conversion of habitat at the Kimboza collection locality and Uluguru localities in the former for the plantation of Cedrela odorata, and in the latter for agriculture. Cedrela odorata is an invasive species and poses a threat to this species. 

There is also the potential threat from hydroelectricty projects at Stiegler's Gorge, although these infrastructure projects are still in discussion.

Conservation Actions [top]

Conservation Actions:

Found in Kanga Forest Reserve, Kimboza Forest Reserve, Selous Game Reserve, Udzungwa Mountains National Park and West Kilombero Scarp Forest Reserve.

Classifications [top]

1. Forest -> 1.6. Forest - Subtropical/Tropical Moist Lowland
1. Forest -> 1.9. Forest - Subtropical/Tropical Moist Montane

In-Place Research, Monitoring and Planning
  Action Recovery plan:No
  Systematic monitoring scheme:No
In-Place Land/Water Protection and Management
  Conservation sites identified:No
  Occur in at least one PA:Yes
In-Place Species Management
In-Place Education
2. Agriculture & aquaculture -> 2.1. Annual & perennial non-timber crops -> 2.1.4. Scale Unknown/Unrecorded
♦ timing: Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

7. Natural system modifications -> 7.2. Dams & water management/use -> 7.2.11. Dams (size unknown)
♦ timing: Future    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

8. Invasive & other problematic species & genes -> 8.1. Invasive non-native/alien species -> 8.1.2. Named species (Cedrela odorata)
♦ timing: Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

Bibliography [top]

IUCN. 2013. IUCN Red List of Threatened Species (ver. 2013.2). Available at: (Accessed: 13 November 2013).

Citation: IUCN SSC East African Plants Red List Authority. 2013. Dorstenia tenuiradiata. The IUCN Red List of Threatened Species 2013: e.T179570A1582965. . Downloaded on 09 October 2015.
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