Cleistocactus is a genus of flowering plants in the cactus family Cactaceae, native to mountainous areas - to 3,000 m (9,843 ft) - of South America (Peru, Uruguay, Bolivia and Argentina). The name comes from the Greek kleistos meaning closed because the flowers hardly open.
|Borzicactus websteramus, syn. Cleistocactus webstramus|
49 species, including:
The stems of these cacti are tall, 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 Cárdenas
- 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.
- 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.