Crotalaria ledermannii 


Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Fabales Leguminosae

Scientific Name: Crotalaria ledermannii
Species Authority: Baker f.

Assessment Information [top]

Red List Category & Criteria: Vulnerable B1ab(iii)+2ab(iii) ver 3.1
Year Published: 2015
Date Assessed: 2015-07-14
Assessor(s): Cheek, M.
Reviewer(s): Onana, J.-M.
Facilitator/Compiler(s): Hilton-Taylor, C.
This is an annual or short-lived perennial species, so a deleterious change in the habitat or poor seed set in one year could drastically reduce the population within 12 months. This herb was assessed as Vulnerable under criterion D2 (Cheek et al. 2000).  Since then, there have been additional collections of this species extending its known range. The original conservation assessment was erroneously maintained in Cheek et al. (2004), Harvey et al. (2004) and Onana and Cheek (2011). This species does still qualify for a Vulnerable listing but under criterion B rather than D. The extent of occurrence is just over 19,000 km², the minimum area of occupancy is 36 km² and the species is known from eight locations. There is continuing decline in the extent and quality of the habitat due to conversion of grassland into cultivated fields, increased use of fire to create grazing for livestock and trampling by the livestock. This species does appear to be tolerant of some disturbance but it is not known to what degree, hence a precautionary listing of Vulnerable.
Previously published Red List assessments:
2000 Vulnerable (VU)

Geographic Range [top]

Range Description: Recorded from Nigeria (Mambilla Plateau (one collection); and Cameroon (Mwanenguba Mts (one collection), Bamenda Highlands (eight collections) and Adamoua (one collection)).
Countries occurrence:
Cameroon; Nigeria
Estimated area of occupancy (AOO) - km2: 36
Number of Locations: 8
Lower elevation limit (metres): 1200
Upper elevation limit (metres): 2200
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: This is a rare species, having been gathered only once in the course of three inventories at Mt Oku and Ijim, once at Bali Ngemba Forest Reserve, Bamenda and Mwanenguba Mts, and twice at Bafut-Ngemba.
Current Population Trend: Decreasing
Additional data:
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: An annual or short-lived perennial herb which grows in grassland and on forest edges; 1,200-2,200 m alt.
Systems: Terrestrial
Continuing decline in area, extent and/or quality of habitat: Yes

Threats [top]

Major Threat(s): The lower elevations are under threat from conversion to agriculture and there is an increasing frequency of fires to provide grazing for livestock and as livestock numbers increase, trampling may also be an issue. The collection from the Mambilla Plateau was taken from a Eucalyptus plantation, so Crotalaria ledermannii may be able to tolerate some disturbance to its habitat.

Conservation Actions [top]

Conservation Actions: The natural habitat of Crotalaria ledermannii is not well characterized. More study is needed to rectify this. A survey to determine the range of this species and levels of regeneration is advisable. Does not appear to be in any protected areas.

Citation: Cheek, M. 2015. Crotalaria ledermannii. The IUCN Red List of Threatened Species 2015: e.T39735A2931859. . Downloaded on 01 December 2015.
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