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Cleistocactus is a genus of columnar cacti from Peru, Uruguay, Bolivia and Argentina. The name comes from the Greek kleistos meaning closed because the flowers hardly open.

The stems are tall and mostly slender and often many branched with numerous ribs with closely set areoles and spines. The flowers are tubular and the tips hardly open with only the style and stamens usually protruding.

The following genera have been brought into synonymy with this genus:

• Akersia Buining
• Bolivicereus C?rdenas
• Borzicactella H.Johnson ex F.Ritter
• Borzicactus Riccob
• Borzicereus Fric & Kreuz. (orth. var.)
• Cephalocleistocactus F.Ritter
• Cleistocereus Fric & Kreuz. (orth. var.)
• Clistanthocereus Backeb.
• Demnosa Fric
• Gymnanthocereus Backeb.
• Hildewintera F.Ritter
• Loxanthocereus Backeb.
• Maritimocereus Akers
• Pseudoechinocereus Buining (nom. inval.)
• Seticereus Backeb.
• Seticleistocactus Backeb.
• Winteria F.Ritter
• Winterocereus Backeb.

i>Cleistocactus is a genus of columnar cacti from Peru, Uruguay, Bolivia and Argentina. The name comes from the Greek kleistos meaning closed because the flowers hardly open.

The stems are tall and mostly slender and often many branched with numerous ribs with closely set areoles and spines. The flowers are tubular and the tips hardly open with only the style and stamens usually protruding.

The following genera have been brought into synonymy with this genus:

• Akersia Buining
• Bolivicereus< /i> C?rdenas
• Borzicactella H.Johnson ex F.Ritter
• Borzicactus Riccob
• Borzicereus Fric & Kreuz. (orth. var.)
• Cephalocleistocactus F.Ritter
• Cleistocereus Fric & Kreuz. (orth. var.)
• Clistanthocereus Backeb.
• Demnosa Fric
• Gymnanthocereus Backeb.
• Hildewintera F.Ritter
• Loxanthocereus Backeb.
• Maritimocereus Akers
• Pseudoechinocereus Buining (nom. inval.)
• Seticereus Backeb.
• Seticleistocactus Backeb.
• Winteria F.Ritter
• Winterocereus Backeb.

References

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• Innes C, Wall B (1995). Cacti' Succulents and Bromaliads. Cassell & The Royal Horticultural Society.
• The species list is referenced from http://www.cactiguide.com/ which is in turn referenced from several books which are listed on that site. The principal book listed here is The Cactus Family by Edward F. Anderson.

External links

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• (French) photos on www.AIAPS.org
• (English) photos on www.cactiguide.com

Taxonomy

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The Genus Akersia is further organized into finer groupings including:

• Species: ZipcodeZoo has pages for 1 species, subspecies, varieties, forms, and cultivars in the Genus Akersia: A. roseiflora

References

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• Innes C, Wall B (1995). Cacti' Succulents and Bromaliads. Cassell & The Royal Horticultural Society.
• The species list is referenced from http://www.cactiguide.com/ which is in turn referenced from several books which are listed on that site. The principal book listed here is The Cactus Family by Edward F. Anderson.

External links

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• (French) photos on www.AIAPS.org
• (English) photos on www.cactiguide.com

Sources

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• The distribution map on the Distribution tab comes from the Global Biodiversity Information Facility and is used with permission.
• Photographs on this page are copyrighted by individual photographers, and individual copyrights apply.
• The technology underlying this page, including the controls behind Keep Exploring, is owned by the BayScience Foundation. All rights are reserved.