Reason for the sensitivity status
This species is not known to be in horticultural trade but is attractive and could be a potential target. Several others of the genus are known to be targeted, exploited and illegally removed from the wild, causing population decline. Evidence shows that the Oxalis genus is in demand in international horticultural trade. Few known location of occurrence makes this species vulnerable to population loss. Releasing data on this species can 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 Critically Rare as it is range restricted, known from one site and is not thought to be threatened (Dreyer et al. 2006). This genus is increasing in demand and of popular interest in international horticultural trade, as indicated by several online marketplace, e-commerce and auction sites. Plants of this genus were among those targeted and/or confiscated during recent criminal prosecutions of illegal plant collecting. There have been several recorded confiscations of species of the Oxalis genus from illegal collection (Confiscation List (2020) provided by Cape Nature). This species is not known to be in horticultural trade but is attractive and could be a potential target (Personal communication, K. Oberlander, 9 August 2022). This suggests that this genus is being targeted and that rare species may be at risk from collection and removal from the wild.
Dreyer, L.L., Oberlander, K.C. & Raimondo, D. 2006. Oxalis porphyriosiphon T.M.Salter. 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 extent of occurrence of less than 100 km² and is known from one site (Dreyer et al. 2006). It is known from 3 subpopulations (Personal communication, K. Oberlander, 9 August 2022).
Dreyer, L.L., Oberlander, K.C. & Raimondo, D. 2006. Oxalis porphyriosiphon T.M.Salter. 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
Range restriction and one known site makes this species vulnerable to population loss.
