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Plectranthus malvinus

Taxonomy
Scientific Name
Plectranthus malvinus Van Jaarsv. & T.J.Edwards
Higher Classification
Dicotyledons
Family
LAMIACEAE
National Status
Status and Criteria
Vulnerable D2
Assessment Date
2016/09/26
Assessor(s)
L. von Staden
Justification
A highly localized habitat specialist (EOO and AOO <5 km²) that is potentially threatened by competition from alien invasive plants.
Distribution
Endemism
South African endemic
Provincial distribution
Eastern Cape
Range
Southern Pondoland, Port St Johns.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Scarp Forest
Description
Forest margins and cliffs.
Threats
This species is potentially threatened by competition from alien invasive plants, which are particularly prone to spreading along forest margins and clearings. There is also a potential threat of habitat degradation due to fire - the grasslands surrounding forests in Pondoland are often burnt, and during the dry season very hot fires often intrude into the forest margin, leading to a decline of forest-margin specialist species. This species' preference for cliffs may however protect it against fire, as the rocky upper margins of riverine gorges act as a natural barrier to fires.
Population

Plectranthus malvinus is a highly localized habitat specialist, known from the sandstone summits of two adjacent hills on either side of the Mzimvubu River at Port St Johns. There are no recent field observations of the population, but it is suspected to be stable.


Population trend
Stable
Citation
von Staden, L. 2016. Plectranthus malvinus Van Jaarsv. & T.J.Edwards. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2019/12/06

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