Lachenalia mediana subsp. rogersii | SANBI Sensitive Species

Assessor: Sarah Schumann

Sensitive in 2010

Family

Hyacinthaceae

Reason for the sensitivity status

This genus is in demand and of popular interest in international horticultural trade. Several species of the Lachenalia genus were among those targeted and confiscated during criminal prosecutions of illegal plant collecting. Few known locations of occurrence with existing threats causing population decline makes this taxon vulnerable to further 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 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 Endangered as it is known from four locations that is threatened by habitat loss from crop cultivation and habitat degradation from overgrazing and alien invasive plant encroachment (Raimondo & Helme, 2019). 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. Another species of this genus is known to be utilized and collected from the wild for horticultural trade (Duncan et al. 2015). Several species of this genus were among those targeted and/or confiscated during recent criminal prosecutions of illegal plant collecting (Confiscation lists (2020-2021) provided by SANBI Karoo Desert Botanical Garden and Kirstenbosch Botanical Garden). This suggests that this genus may be targeted and that endangered species may be at risk to over-exploitation.

Duncan, G.D., Helme, N.A., Ebrahim, I. & von Staden, L. 2015. Lachenalia viridiflora W.F.Barker. National Assessment: Red List of South African Plants version 2020.1.

Raimondo, D. & Helme, N.A. 2019. Lachenalia mediana Jacq. subsp. rogersii (Baker) G.D.Duncan. National Assessment: Red List of South African

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 1700 km² and is known from four locations (Raimondo & Helme, 2019).

Raimondo, D. & Helme, N.A. 2019. Lachenalia mediana Jacq. subsp. rogersii (Baker) G.D.Duncan. National Assessment: Red List of South African

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

Few known locations of occurrence and severe existing threats (Raimondo & Helme, 2019), places the persistence of this subspecies at risk. Were exploitation to also occur, recruitment and recovery may be poor.

Raimondo, D. & Helme, N.A. 2019. Lachenalia mediana Jacq. subsp. rogersii (Baker) G.D.Duncan. National Assessment: Red List of South African

Reference file

Lachenalia mediana subsp rogersii Threatened Species Programme _ SANBI Red List of South African Plants.pdf539.96 KB

lachenalia _ eBay.pdf675.25 KB

Lachenalia aucfan.pdf868.19 KB