Justicia orbicularis 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Scrophulariales Acanthaceae

Scientific Name: Justicia orbicularis (Lindau) V.A.W.Graham

Assessment Information [top]

Red List Category & Criteria: Vulnerable A2c ver 3.1
Year Published: 2014
Date Assessed: 2011-03-25
Assessor(s): Darbyshire, I.
Reviewer(s): Onana, J.-M. & Cheek, M.
A highly distinctive species known from 13 locations. Subpopulations appear disjunct, being absent in several seemingly suitable areas. In Bakossi, it is only known in the west, though further exploration of the lowlands of southern Bakossi may reveal further subpopulations. It is also absent from the lowlands around Mt Cameroon, and has not been recorded in extensively collected forest areas around Bipinde and Kribi in southern Cameroon. The assessment of this taxon as Vulnerable in Cheek et al. (2004a: 141) is maintained here, it being estimated that more than 30% of the population has been lost in the last three generations, here estimated as amounting to 30 years.
Previously published Red List assessments:

Geographic Range [top]

Range Description:Recorded from Nigeria: Cross River State (three collections); Equatorial Guinea: Bioko (one collection); Cameroon, SW Region: Bakossi (three collections), Kumba (one collection), Central Region: nr. Yaoundé (two collections), S Region: Ebolowa-Amban (one collection), and Littoral Region: Bafang-Yabassi (one collection).
Countries occurrence:
Cameroon; Equatorial Guinea (Bioko); Nigeria
Additional data:
Estimated area of occupancy (AOO) - km2:52
Number of Locations:13
Upper elevation limit (metres):700
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The population size is not known but it is most certainly in decline over much of its range (30% population reduction i the past 30 years)
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:Grows in lowland forest, often along streams; 0-700 m alt.
Continuing decline in area, extent and/or quality of habitat:Yes
Generation Length (years):10

Threats [top]

Major Threat(s): Throughout its range, deforestation has been extensive in the lowlands due to expanding agriculture, urbanization and logging, and this continues outside protected areas.

Conservation Actions [top]

Conservation Actions: As the species is readily identifiable, population census data should be possible in protected areas, and an assessment of its habitat requirements made. Further inventory work in suitable lowland sites, such as the Loum Forest Reserve, may provide additional sites. The species appears to occur in protected areas in all of the range states - Cross River National Park (Nigeria), Reserva cientifica de la Caldera de San Carlos (Bioko, Equatoria Guinea) and the Bakkosi Mountains Wildlife Reserve (Cameroon).

Citation: Darbyshire, I. 2014. Justicia orbicularis. The IUCN Red List of Threatened Species 2014: e.T45412A3001152. . Downloaded on 23 May 2018.
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