These unique "Spiral" Saguaro's are unusual.
Some people call these
"Barborshop Pole" Saguaro's, "Checker Board" Saguaro's, "Corkscrew" Saguaro's
and/or "Marilyn Monroe Curves" Saguaro's.
Source: Webster's New World Dictionary - College Edition
spiral (spi'rel), adj,
1.) circling continuously around a point or center in curves that constantly increase
(or decrease) in size;
coiled or coiling in one plane2.) of, or having the nature of a spiral,
2.) coiled or coiling in constantly changing planes, as the thread of a screw; helical.
Source:WordNet (r) 1.7
1: cause to undergo mutation; of cells
2: undergo mutation; "cells mutate"