Soehrensia is a formerly accepted genus of cacti native to South America. It is now included within Echinopsis. Its former species are native to northern Argentina, Bolivia, northern Chile, Paraguay and Peru, and have been introduced elsewhere, including Mexico, southern Africa and Spain.
Taxonomy The genus was established by Curt Backeberg in 1938. The genus name Soehrensia is in honour of Johannes Soehrens (died 1934), who was a Dutch botanist and Professor and Director of the Botanical Garden in Santiago de Chile. He was an authority on cacti.
Studies in the 1970s and 1980s resulted in several formerly separate genera being absorbed into Echinopsis, including Soehrensia. In the 2016 edition of the CITES Cactaceae Checklist, it was restored as an independent genus, the position of the World Flora Online . A major 2025 classification of the family Cactaceae returned Soehrensia to a synonym of Echinopsis, the position accepted by Plants of the World Online .
Species Species previously placed in the genus Soehrensia that Plants of the World Online places in Echinopsis include: Flower Plant Scientific Name Distribution Soehrensia angelesiae → Echinopsis angelesiae Argentina (Salta) Soehrensia arboricola → Echinopsis arboricola Argentina (Salta), Bolivia Soehrensia bruchii → Echinopsis bruchii Argentina (Tucumán) Soehrensia camarguensis → Echinopsis camarguensis Bolivia Soehrensia candicans → Echinopsis candicans Argentina Soehrensia caulescens → Echinopsis caulescens Bolivia Soehrensia formosa → Echinopsis formosa Argentina, Bolivia, Chile Soehrensia grandiflora → Echinopsis crassicaulis Argentina Soehrensia hahniana → Echinopsis hahniana Paraguay (Rio Apa) Soehrensia huascha → Echinopsis huascha Argentina Soehrensia quadratiumbonata → Echinopsis quadratiumbonata Bolivia. Soehrensia sandiensis → Echinopsis sandiensis Peru Soehrensia schickendantzii → Echinopsis schickendantzii Argentina. Soehrensia serpentina → Echinopsis serpentina Bolivia, Peru Soehrensia shaferi → Echinopsis friedrichii ArgentinaSoehrensia smrziana → Echinopsis smrziana Argentina Soehrensia spachiana → Echinopsis spachiana Argentina, Bolivia Soehrensia strigosa → Echinopsis strigosa Argentina Soehrensia tarijensis → Echinopsis tarijensis Bolivia, Argentina (Jujuy) Soehrensia thelegona → Echinopsis thelegona Argentina Soehrensia thelegonoides → Echinopsis thelegonoides Argentina (Jujuy) Soehrensia vasquezii → Echinopsis vasquezii Bolivia Soehrensia volliana → Echinopsis volliana Bolivia Soehrensia walteri → Echinopsis walteri Argentina (Salta)
A hybrid originally named Trichocereus × mendocinus in 2000 was placed in Soehrensia as Soehrensia × mendocina in 2021. , Plants of the World Online regarded this as "unplaced". It is considered to be a hybrid between Soehrensia candicans (=Echinopsis candicans) and S. strigosa (=E. strigosa). p. 265
References
Bibliography Edward F. Anderson, The Cactus Family (Timber Press, 2001) , pp. 255–286
External links