Cholla Cactus Spines — Photo-Artistry by kenne
The spines of a cholla are actually modified leaves that help protect the surface of
the cactus from preditors. A surprising function of cacti spines is to provide shade
for the cactus itself, yes, shade. Each spine casts a shadow on the cactus as the sun
moves across the desert sky.
— kenne
Interesting facts! Thanks for sharing.