Achyrospermum seychellarum 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Lamiales Lamiaceae

Scientific Name: Achyrospermum seychellarum Baker

Assessment Information [top]

Red List Category & Criteria: Endangered B1ab(iii)+2ab(iii) ver 3.1
Year Published: 2011
Date Assessed: 2007-09-20
Needs updating
Assessor(s): Gerlach, J.
Reviewer(s): Hilton-Taylor, C. & Lutz, M.L.
Achyrospermum seychellarum is a restricted range species, with an area of occupancy (AOO) of 1 km² and an extent of occurrence (EOO) of 5 km². There are three subpopulations, which are threatened by habitat deterioration (>95% in a single subpopulation). Historically it was present on Mahé  but was last recorded there in 1908. It is therefore listed as Endangered.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species is endemic to the Seychelles. Historically recorded from Mahé and Silhouette islands, but it is now restricted to Silhouette. The EOO and AOO are estimated to be approximately  5 km² and 1 km² respectively.
Countries occurrence:
Seychelles (Seychelles (main island group))
Additional data:
Estimated area of occupancy (AOO) - km2:1
Number of Locations:3
Lower elevation limit (metres):390
Upper elevation limit (metres):500
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The total population in 2007 was estimated to consist of fewer than 700 plants (Anse Mondon valley - 680 plants; Mon Plaisr - 2 plants; Gratte Fesse - 0 (2 plants in 1990), Trilepisium site - 10 plants).
Current Population Trend:Stable
Additional data:
Number of mature individuals:650-700

Habitat and Ecology [top]

Habitat and Ecology:Found in high forest, especially in sheltered valleys with high humidity at 390-500 m asl.

Threats [top]

Major Threat(s): Threatened by habitat deterioration due to invasive species (especially Cinnamomum verum). Plants grown experimentally on Mahé have not survived due to predation by the introduced giant African snail Achatina fulica. This is a low altitude species which does not occur in the present range of the species. Reports of damage from the sap-sucking insect Icerya seychellarum and fulgoroids have not been substantiated.

Conservation Actions [top]

Conservation Actions: Present in the Silhouette National Park. Attempts should be made to re-establish the species on Mahé.

Citation: Gerlach, J. 2011. Achyrospermum seychellarum. The IUCN Red List of Threatened Species 2011: e.T193402A8856100. . Downloaded on 25 September 2018.
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