Polystachya bicalcarata 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Liliopsida Orchidales Orchidaceae

Scientific Name: Polystachya bicalcarata Kraenzl.

Assessment Information [top]

Red List Category & Criteria: Vulnerable A2c+3c; B2ab(iii) ver 3.1
Year Published: 2004
Date Assessed: 2004-04-30
Needs updating
Assessor(s): Pollard, B.J. & Darbyshire, I.
Reviewer(s): Zapfack, L. & Cribb, P.J. (Orchid Red List Authority)
This species was previously assessed as EN A1c+2c (Cable and Cheek 1998, Cheek et al. 2000, Hilton-Taylor 2000). The assessment is updated here to take into account the new submontane locations on Mt Kupe, where this taxon’s forest habitat remains largely intact, thus reducing the estimated percentage of habitat loss from > 50% to > 30%. This taxon is also assessed under criterion B, being known from nine locations, one of which remains doubtful, with an area of occupancy of less than 500 km².
Previously published Red List assessments:

Geographic Range [top]

Range Description:Recorded from Equatorial Guinea, Bioko (1 doubtful collection); Cameroon, S.W. Province: Banyong Mbo Wildlife Sanctuary (1 collection), Buea (3 collections), Mt Cameroon (unlocated, 1 collection), Mt Etinde (1 collection), Mt Kupe (2 collections at 2 locations); W. Province: Bamboutos Mts (1 collection); N.W. Province: Mt Oku (1 collection).
Countries occurrence:
Cameroon; Equatorial Guinea (Bioko)
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Current Population Trend:Decreasing
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:An epiphyte of submontane and montane forest; 950–2,000 m alt.

Threats [top]

Major Threat(s): Threatened by forest clearance for agriculture and firewood, particularly in the Bamboutos Mts and above Buea on Mt Cameroon.

Conservation Actions [top]

Conservation Actions: Confirmation of this species’ presence on Bioko is required. Surveys of this taxon at each of the collection localities should be made in order to assess its abundance. Continued protection of the submontane forest on Mt Kupe should ensure this species’ future survival.

Citation: Pollard, B.J. & Darbyshire, I. 2004. Polystachya bicalcarata. The IUCN Red List of Threatened Species 2004: e.T39582A10242370. . Downloaded on 24 May 2018.
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