Espostoa melanostele
 
  Latin name: Espostoa melanostele  Common name: Old man of Peru  Plant group: Cacti  Plant family: Trichocereae  Climate: Subtropical mountain climate  Minimal temperature: 5°C (41°F)  Optimal temperature: 24-26°C (75-78°F)  Recommended place: sunny or penumbral  Soil: cactus soil  Height: 100 cm (39 in.)  Flower color: white  Repotting: every 36 months (3 years)  Rarity: no  Pests: Woolly schield louse (Pseudococcidae)  Diseases: Basal rot (Sclerotium cacticola) Fire Blight  (Erwinia) Bacterial wilt (Pseudomonas) Bacterial diseases () Fungal wilt (Verticillium) Yellow fungus (Fusarium oxysporum)  Origin country: Peru     
 
