100 years ago, the many species of cacti looked just as they look today. The process of evolutionary change takes much longer than one or two centuries, but several (or many) thousands of years.
100 years
100 years old
The lifespan is 50-100 years for Fishook Barrel Cactus. Chamazal National Memorial has some that are over 100 years old.
It is now known what North America look like 100 million years from now.
No, it may take over 100 years for the cactus to sprout its first arms.
like a flower
This Is What the Ocean Might Look Like in 100 Years
It looked like my big fat balls
it looked ugly
A Big Rocky moutain
they hade wooden frame
The age of a saguaro cactus can be estimated by counting its growth rings, similar to how you would determine the age of a tree. Each ring represents a year of growth. Counting the rings at the base of the cactus can give an approximation of its age, with each arm adding around 75-100 years to the total age.