Oreocereus

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Oreocereus
File:Oreocereus celsianus 1.jpg
A small O. celsianus
Scientific classification
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Oreocereus

Species

Oreocereus celsianus - old man of the Andes
Oreocereus doelzianus
Oreocereus fossulatus
Oreocereus hendriksenianus
Oreocereus leucotrichus
Oreocereus ritteri
Oreocereus trollii
Oreocereus variicolor
etc.

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Oreocereus is a genus of cacti (family Cactaceae), known only from high altitudes of the Andes. Its name means "mountain cereus", formed from the Greek prefix oreo- (ὀρεο-, mountain)[1] and the New Latin cereus, meaning wax or torch.

As they are covered with woolly white fuzz (modified spines), a few species in this genus are sometimes known as the old-man cactus,[2][3] a generic name that also refers to Cephalocereus senilis or Espostoa lanata. More rarely, the old man of the mountain is also used for some species.[nb 1]

Synonymy

The following genera have been included in this genus:

References

  1. “[...] hairy cacti in cultivation include: golden old man (C. chrysacanthus), old woman (Mammillaria hahniana), Chilean old lady (Neoporteria senilis), and old man of the mountain (Borzicactus trollii).”[4] [emphasis added, B. trollii being an old name for O. trollii].[5]
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  2. University of Vermont, Indoor Plants
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  4. Encyclopaedia Britannica (1991), entry ‘old-man cactus’.
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