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Soehrensia
	Soehrensia bruchii
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Order:	Caryophyllales
Family:	Cactaceae
Subfamily:	Cactoideae
Tribe:	Cereeae
Subtribe:	Trichocereinae
Genus:	Soehrensia; Backeb.
Type species
	Soehrensia bruchii (Britton & Rose) Backeb.;
Species
	Around 24, see text.
Synonyms
	Helianthocereus Backeb. ; Megalobivia Y.Itô, not validly publ.;

Soehrensia is a genus of cacti native to South America.

It is native to northern Argentina, Bolivia, northern Chile, Paraguay and Peru, and has been introduced elsewhere, including Mexico, southern Africa and Spain.^[1]

Taxonomy

The genus was established by Curt Backeberg in 1938.^[1]

The genus name of 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.^[2]

Studies in the 1970s and 1980s resulted in several formerly separate genera being absorbed into Echinopsis, including Soehrensia and Helianthocereus,^[3] until it was re-assessed to be a separate genus.^[4]^[5]

Species

As of October 2023^[update], Plants of the World Online accepted the following species:^[1]

Flower	Plant	Scientific Name	Distribution
		Soehrensia angelesiae (R.Kiesling) Schlumpb.	Argentina (Salta)
		Soehrensia arboricola (Kimnach) Schlumpb.	Argentina (Salta), Bolivia
		Soehrensia bruchii (Britton & Rose) Backeb.	Argentina (Tucumán)
		Soehrensia camarguensis (Cárdenas) Schlumpb.	Bolivia.
		Soehrensia candicans (Gillies ex Salm-Dyck) Schlumpb.	. Argentina
		Soehrensia caulescens (F.Ritter) Schlumpb.	Bolivia.
		Soehrensia formosa (Pfeiff.) Backeb.	Argentina, Bolivia, Chile
		Soehrensia grandiflora (Britton & Rose) Schlumpb.	Argentina.
		Soehrensia hahniana (Backeb.) Schlumpb.	Paraguay (Rio Apa)
		Soehrensia huascha (F.A.C.Weber) Schlumpb.	Argentina
		Soehrensia × mendocina (Méndez) Schlumpb. (S. candicans × S. strigosa.)	Argentina (Mendoza)
		Soehrensia quadratiumbonata (F.Ritter) Schlumpb.	Bolivia.
		Soehrensia sandiensis (Hoxey) Schlumpb.	Peru.
		Soehrensia schickendantzii (F.A.C.Weber) Schlumpb.	Argentina.
		Soehrensia serpentina (M.Lowry & M.Mend.) Schlumpb.	Bolivia, Peru
		Soehrensia shaferi (Britton & Rose) Schlumpb.	Argentina.
		Soehrensia smrziana (Backeb.) Backeb.	Argentina
		Soehrensia spachiana (Lem.) Schlumpb.	Argentina, Bolivia
		Soehrensia strigosa (Salm-Dyck) Schlumpb.	Argentina
		Soehrensia tarijensis (Vaupel) Schlumpb.	Bolivia, Argentina (Jujuy)
		Soehrensia thelegona (F.A.C.Weber) Schlumpb.	Argentina
		Soehrensia thelegonoides (Speg.) Schlumpb.	Argentina (Jujuy)
		Soehrensia vasquezii (Rausch) Schlumpb.	Bolivia
		Soehrensia volliana (Backeb.) Schlumpb.	Bolivia
		Soehrensia walteri (R.Kiesling) Schlumpb.	Argentina (Salta)

References

^ ^a ^b ^c ^d ^e "Soehrensia Backeb. | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 16 October 2023.
^ Burkhardt, Lotte (January 2022). Eine Enzyklopädie zu eponymischen Pflanzennamen [Encyclopedia of eponymic plant names] (PDF) (in German). Berlin: Botanic Garden and Botanical Museum, Freie Universität Berlin. doi:10.3372/epolist2022. ISBN 978-3-946292-41-8. S2CID 246307410. Retrieved November 1, 2022.
^ Friedrich, H.; Glaetzle, W. (1 December 1983). "Seed-morphology as an aid to classifying the genus Echinopsis Zucc". Bradleya. 1: 91–104. doi:10.25223/brad.n1.1983.a9. S2CID 90895449.
^ "Soehrensia Backeb". worldfloraonline.org. Retrieved 29 October 2022.
^ Hunt, D.R. 2016: CITES Cactaceae Checklist. 3rd edition. London: Kew Publishing.