Reason for the sensitivity status
This genus is in demand and of popular interest in international horticultural trade. Other species from this genus are known to be threatened by harvesting of wild individuals for horticultural purposes. Few known locations of occurrence with potential threats makes this subspecies vulnerable to population loss. Were exploitation to also occur, recruitment and recovery may be poor. Releasing data on this subspecies could exacerbate threat and vulnerability.
This species is either similar to another sensitive species or belongs to a group containing sensitive species, and is extremely rare in the wild. The localities of wild populations need to be protected to avoid loss to exploitation, which, due to its rarity, could drive the species to extinction within a very short time.
Exploitation extent
Uncertain - No data exists yet showing that this species is exploited in the wild, however it has one or more relatives or look-alike species (found in South Africa or globally) that are known to be utilised. This species has a similar life form or other relevant traits to its exploited relative(s), making it highly likely that it would be exploited for the same purposes.
Justification and references
According to the SANBI Red List Assessment, this species is Vulnerable as it is has a small population that is potentially threatened by habitat loss and degradation (Pfab & Victor, 2005). This genus is currently in demand and of popular interest in international horticultural trade, as indicated by several online marketplace, e-commerce and auction sites.
Pfab, M.F. & Victor, J.E. 2005. Ceropegia decidua E.A.Bruce subsp. pretoriensis R.A.Dyer. National Assessment: Red List of South African Plants version 2020.1.
Population vulnerability
Population is vulnerable: size is <= 2500 mature individuals OR the number of known subpopulations is <= 5 OR range is <= 100km2 OR species at risk of localised extinctions
Justification and references
This taxon has an estimated population size of fewer than 1000 mature individuals (Pfab & Victor, 2005).
Pfab, M.F. & Victor, J.E. 2005. Ceropegia decidua E.A.Bruce subsp. pretoriensis R.A.Dyer. National Assessment: Red List of South African Plants version 2020.1.
Targeted demographics
Unknown.
Regeneration potential
This species has a slow population growth rate, or the growth rate varies depending on habitat, and there is a poor chance the wild populations will recover from exploitation OR a collector might feasibly harvest the entire extant population removing the chance of subsequent recruitment.
Justification and references
A small population and restriction to an area of occupancy of between 3.5 and 11 km² makes this species highly vulnerable to population loss (Pfab & Victor, 2005). Were exploitation to also occur, recruitment and recovery may be poor.
Pfab, M.F. & Victor, J.E. 2005. Ceropegia decidua E.A.Bruce subsp. pretoriensis R.A.Dyer. National Assessment: Red List of South African Plants version 2020.1.
