Old man cactus
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The Old Man Cactus (Cephalocereus senilis) is a tall cactus native to Mexico. It is threatened in the wild, but widespread propagation and popularity in cultivation have reduced the demand on wild populations.
The Old Man cactus is somewhat hardy, and can bloom red, yellow, or white, though it may not flower until 10-20 years of age. In the wild, this species may reach up to 50 feet in height, forming tall, generally unbranched poles (unlike the saguaro, which branches frequently). They do, however, offset from the base.
The most striking feature of the Old Man Cactus is the long, white hair it possesses, which serve to protect it from the sun. The coat of hair makes many plants appear almost snow-white (however, the hairs conceal numerous sharp yellow spines). It is in reference to the shaggy white coat that the popular name 'Old Man Cactus' developed.
In cultivation, Old Man Cacti prefer a very well-drained soil mix (more so than other cacti), and lots of bright sunlight, which encourages growth of the hair.
External links
- http://davesgarden.com/pf/go/63801/
- http://www.desert-tropicals.com/Plants/Cactaceae/Cephalocereus_senilis.html
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