Soehrensia

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
HelianthocereusBackeb. MegalobiviaY.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.

Taxonomy

The genus was established by Curt Backeberg in 1938. ^[1] 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. ^[2]

Studies in the 1970s and 1980s resulted in several formerly separate genera being absorbed into Echinopsis , including Soehrensia. ^[3] In the 2016 edition of the CITES Cactaceae Checklist, it was restored as an independent genus, ^[4] the position of the World Flora Online as of November 2025 ^[update] . ^[5] A major 2025 classification of the family Cactaceae returned Soehrensia to a synonym of Echinopsis, ^[6] the position accepted by Plants of the World Online as of November 2025 ^[update] . ^[7]

Species

Species previously placed in the genus Soehrensia that Plants of the World Online places in Echinopsis include: ^[8]

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

References

1. "Soehrensia Backeb." International Plant Names Index (IPNI). Royal Botanic Gardens, Kew; Harvard University Herbaria & Libraries; Australian National Botanic Gardens . Retrieved 2025-11-22.
2. 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.
3. Friedrich, H.; Glaetzle, W. (1 December 1983). "Seed-morphology as an aid to classifying the genus Echinopsis Zucc". Bradleya. 1 (1): 91–104. Bibcode:1983Bradl...1...91F. doi:10.25223/brad.n1.1983.a9. S2CID   90895449.
4. Hunt, D. (2016). CITES Cactaceae Checklist (PDF) (3rd ed.). Royal Botanic Gardens, Kew. ISBN   978-0-9933113-2-1 . Retrieved 2025-11-20.
5. "Soehrensia Backeb". worldfloraonline.org. Retrieved 29 October 2022.
6. de Vos, Jurriaan M.; Eggli, Urs; Nyffeler, Reto; Larridon, Isabel; McGinnie, Catherine; Epitawalage, Niroshini; Maurin, Olivier; Forest, Félix & Baker, William J. (2025). "Phylogenomics and classification of Cactaceae based on hundreds of nuclear genes". Plant Systematics and Evolution. 311 28. doi:10.1007/s00606-025-01948-z.
7. "Soehrensia Backeb. | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 2025-11-22.
8. "Search for 'Soehrensia'". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2025-11-22.

Bibliography

• Edward F. Anderson, The Cactus Family (Timber Press, 2001) ISBN   0-88192-498-9, pp. 255–286

External links

• Media related to Soehrensia at Wikimedia Commons
• Data related to Soehrensia at Wikispecies