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Crassula susannae

Assessor: Sarah Schumann

Sensitive in 2010
Yes
Family
Crassulaceae
Reason for the sensitivity status
This species is thought to be potentially threatened with collection for the specialist succulent horticultural trade. There have been several recorded confiscations of this species and others of the Crassula genus from illegal collection. This genus is in demand and of popular interest in international horticultural trade. A small population size with existing threats causing population decline makes this species vulnerable to further population loss. Recruitment and recovery from harvesting may be poor. Releasing data on this species could exacerbate threat and vulnerability.
This species is extremely rare in the wild and is known to be exploited, utilised or traded. The localities of remaining populations need to be protected to avoid any further exploitation, which is likely to drive it to extinction.
Exploitation extent
Significant - wild individuals of the species are known to be exploited, collected, traded or utilized in a targeted manner, and utilisation is widespread, affects the majority of wild populations and/or is causing rapid decline of the wild population.
Justification and references

According to the SANBI Red List Assessment, this species is Vulnerable as it is known from one location and is threatened with habitat loss and potentially threatened with collecting for the specialist succulent horticultural trade (Raimondo et al. 2018). This genus is 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 (Gamieldien SAPS, 2021). There have been several recorded confiscations of this species and of others of the Crassula genus from illegal collection (Confiscation List (2018-2021) provided by Cape Nature, SANParks Sendelingsdrift Botanic Garden, SANBI Kirstenbosch Botanical Garden and Karoo Desert Botanic Garden). This suggests that this genus is being targeted and that this species may be threatened.

Gamieldien, C.M. 2021. 28 May 2021. Operation Crassula nets successes worth millions. Media Statement. South African Police Service, Office of the Provincial Commissioner Northern Cape. Available at: https://www.saps.gov.za/newsroom/selnewsdetails.php?nid=32837

Raimondo, D., Victor, J.E. & Burgoyne, P.M. 2018. Crassula susannae Rauh & Friedrich. 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 is known from one location (Raimondo et al. 2018).

Raimondo, D., Victor, J.E. & Burgoyne, P.M. 2018. Crassula susannae Rauh & Friedrich. National Assessment: Red List of South African Plants version 2020.1.

Targeted demographics
Mature (breeding) individuals are killed, significantly weakened or are permanently removed from the wild, OR immature individuals are targeted and this significantly impacts mature (breeding) individuals.
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

Point endemics are highly vulnerable to population loss. Recruitment and recovery from harvesting may be poor. 

Reference file
South African Police Service Crassula_42.pdf955.78 KB
crassula _ eBay.pdf1.25 MB
Crassula Aucfan.pdf514.65 KB
Crassula Rakuten.pdf1.06 MB