Brachystephanus longiflorus 


Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Scrophulariales Acanthaceae

Scientific Name: Brachystephanus longiflorus
Species Authority: Lindau

Assessment Information [top]

Red List Category & Criteria: Vulnerable B2ab(iii) ver 3.1
Year Published: 2014
Date Assessed: 2011-03-25
Assessor(s): Cheek, M.
Reviewer(s): Onana, J.-M.
Despite the addition of four new sites and an expanded range from the Champluvier and Darbyshire revision (2009), the assessment of this taxon made in Cheek et al. (2004) as Vulnerable is maintained here since only six locations are known (AOO 36 km² with 4 km² cells). The paucity of collections from Cameroon despite extensive survey work (e.g. not found recently at Mt Cameroon despite intensive surveys in the 1990s), and the lack of records from such areas as the Bakossi Mountains and the Rumpi Hills, indicate that this species is restricted in range and genuinely rare.
Previously published Red List assessments:
2004 Vulnerable (VU)

Geographic Range [top]

Range Description: Range: Nigeria: Ogoja (one collection); Bioko (three collections, one site); Cameroon, SW Region: Mt Kupe (two collections), Mt Cameroon (two collections, one site); Centre Region: Mbango, Ndikiniméki, Eséka, Ngambé (one collection/site each). Area of occupancy of 36 km was estimated using 4 km 2.
Countries occurrence:
Cameroon; Equatorial Guinea (Bioko); Nigeria
Estimated area of occupancy (AOO) - km2: 36
Number of Locations: 6
Lower elevation limit (metres): 1000
Upper elevation limit (metres): 1550
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: There is no information on the population size but it appears to be declining.
Current Population Trend: Decreasing
Additional data:
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: Grows in submontane and montane forest undergrowth; (1,000-)1,300-1,550 m alt.
Systems: Terrestrial
Continuing decline in area, extent and/or quality of habitat: Yes

Threats [top]

Major Threat(s): Forest clearance for wood and agriculture threatens the Nigerian subpopulation and also the Cameroonian subpopulations at Mt Cameroon (Buea), Ndikiniméki and Eséka.

Conservation Actions [top]

Conservation Actions: Management suggestions: so long as forest remains largely undisturbed above 1,000 m, no intervention is required in Bioko or Cameroon; confirmation of its continued existence in Nigeria is required. The species possibly occurs in Mt Cameroon National Park but there are no recent records.

Citation: Cheek, M. 2014. Brachystephanus longiflorus. The IUCN Red List of Threatened Species 2014: e.T45406A3000760. . Downloaded on 25 November 2015.
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