Which of these trees do not have annual growth rings?

Dracaena draco it grows slowly, requiring about ten years to reach 1.2 metres (4 ft) in height. Being a monocotyledon, it does not display any annual or growth rings so the age of the tree can only be estimated by the number of branching points before reaching the canopy. The Guanches worshiped a specimen in Tenerife. It was 70 feet (21 m) tall and 45 feet (14 m) in circumference, and was estimated to be 6000 years old.