Heliotropium nigricans


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Heliotropium nigricans
Species Authority: Balf.f.

Assessment Information [top]

Red List Category & Criteria: Vulnerable D2 ver 3.1
Year Published: 2004
Date Assessed: 2004-04-30
Assessor(s): Miller, A.
Reviewer(s): Abuzinada, A.H. & AL-Eisawi, D.M.H. (Arabian Plants Red List Authority)
A rare species, with a very limited area of occupancy.

Geographic Range [top]

Range Description: Endemic to Soqotra.
Yemen (Socotra)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: Locally abundant on the southern limestone plateau in Dracaena woodland (Firmihin) and semi-deciduous woodland (Qatariyah). Altitude of 400–600 m.

A shrub < 1 m, almost prostrate in exposed places, all parts thinly covered with short, appressed, tuberculate-based hairs. Leaves: subopposite, dark green, glossy, broadly elliptic to subcircular, 0.5–1.2 x 0.5–1 cm, rounded, entire. Flowers: solitary or paired at ends of branches. Calyx: narrowly triangular, ca. 1 mm long. Corolla: white, 6–7 mm across; tube very short. Stigmas: triangular. Nutlets: 4.

A very distinctive species distinguished by the subopposite, almost circular glossy leaves. Its affinities within the genus are not at all obvious.
Systems: Terrestrial

Citation: Miller, A. 2004. Heliotropium nigricans. The IUCN Red List of Threatened Species. Version 2014.3. <>. Downloaded on 27 March 2015.
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