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.
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 previously placed in the genus Soehrensia that Plants of the World Online places in Echinopsis include:
A hybrid originally named Trichocereus ÃÂ mendocinus in 2000 was placed in Soehrensia as Soehrensia ÃÂ 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).