Look up: oreocereus

1. Oreocereus
   (Old Man Of The Andes, Old Man Of The Mountains) This group consists of eleven, mostly columnar-shaped cacti found in high altitudes from Peru to Bolivia and Argentina. These attractive cacti are covered in long, white, hair-like spines (which becomes more dense in strong light) to protect them from...
   Found on http://www.botany.com/oreocereus.html
   
   
2. Oreocereus
   `Oreocereus` is a genus of cacti (family Cactaceae), known only from high altitudes of the Andes. Its name was formed from Greek and means "mountain cereus". Synonymy: The following genera have been included in this genus:
   Found on http://en.wikipedia.org/wiki/Oreocereus