Impatiens grandisepala 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Geraniales Balsaminaceae

Scientific Name: Impatiens grandisepala Grey-Wilson

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B2ab(iii); D ver 3.1
Year Published: 2014
Date Assessed: 2011-03-25
Assessor(s): Cheek, M.
Reviewer(s): Onana, J.-M.
Facilitator/Compiler(s): Lopez Poveda, L.
Known only from a single collection (Satabié 303, YA, P) made in June 1979 from Efolofo, 30 km NW of Muyuka on the N. side of the mountain. "Impatiens grandisepala is an extraordinary species known only from a single gathering in the Cameroun. The most obvious features of this plant are the very large and conspicuous lateral sepals which droop downwards, partially or wholly concealing the lower sepal and spur, a characteristic quite unlike any other African species of Impatiens." (Grey-Wilson in Impatiens of Africa 1980: 216). Unsatisfactorily assessed as Data Deficient by Cheek in Cable and Cheek (1998). This species is only known from a tiny population comprising fifty mature individuals in a single location with an an area of occupancy is 4 km², and there is continuing decline in the extent and quality of the habitat due to agricultural activities. Hence it qualifies for listing as Critically Endangered.
Previously published Red List assessments:

Geographic Range [top]

Range Description:The species is a Cameroon endemic, (SW Region: Mt Cameroon at Efolofo (one pre-1988 collection)).
Countries occurrence:
Additional data:
Estimated area of occupancy (AOO) - km2:4
Number of Locations:1
Lower elevation limit (metres):1150
Upper elevation limit (metres):1150
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Less than 50 individuals were recorded at the only location where the species has been collected.
Current Population Trend:Decreasing
Additional data:
Number of mature individuals:1-49
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:Epiphytic species in deeply shaded montane forest; 1,150 m alt.
Continuing decline in area, extent and/or quality of habitat:Yes

Threats [top]

Major Threat(s): The species is threatened due to forest clearance for agriculture, small holders and agro-industry like palm oil plantations in the Tiko area.

Conservation Actions [top]

Conservation Actions: This species should be looked for in the wet season, ideally with the help of Dr Satabié (retired head of the National Herbarium) and the state and extent of the population assessed.

Citation: Cheek, M. 2014. Impatiens grandisepala. The IUCN Red List of Threatened Species 2014: e.T39500A2927763. . Downloaded on 25 June 2018.
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