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Crassula rupestris subsp. marnierana

Assessor: Sarah Schumann

Sensitive in 2010
No
Family
Crassulaceae
Reason for the sensitivity status
There have been several recorded confiscations of species of the Crassula genus from illegal collection. This genus is in demand and of popular interest in international horticultural trade. As this taxon does not have a vulnerable population size and it is not thought to be threatened, were exploitation to occur, recruitment and recovery may be possible.
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 Rare as it is known from less than 10 sites and is not experiencing significant threat (Raimondo, 2007). 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 species 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. 2007. Crassula rupestris Thunb. subsp. marnierana (H.E.Huber & H.Jacobsen) Toelken. National Assessment: Red List of South African Plants version 2020.1. 

Population vulnerability
Population is not vulnerable: size is > 2500 mature individuals, AND the number of known subpopulations is > 5 AND range > 100km2
Justification and references

This taxon is known from 10 sites (Raimondo, 2007).

Raimondo, D. 2007. Crassula rupestris Thunb. subsp. marnierana (H.E.Huber & H.Jacobsen) Toelken. 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

Majority of Crassula species are not considered to be slow growing (Rogerson. C, personal communication 2021, 26 October). As this taxon does not have a vulnerable population size and it is not thought to be threatened, were exploitation to occur, recruitment and recovery may be possible.

Reference file
South African Police Service Crassula.pdf955.78 KB
Crassula rupestris subsp. marnierana Threatened Species Programme _ SANBI Red List of South African Plants.pdf864.57 KB
crassula _ eBay.pdf1.25 MB
Crassula Aucfan.pdf514.65 KB
Crassula Rakuten.pdf1.06 MB