The plant is thorny. The color is green and the contents of the stem seem to be chewy. It is suspected that the thorns are protective for the plant so that it is not eaten by animals, or maybe humans. It is also possible that the thorns protect the plant from pests.
To find out, you should refer to scientific research on the science of botany. Especially the cactus. Yes, I'm talking about cacti. Plants that used to live in the desert, have now been cultivated as ornamental plants in tropical countries.
In time, the cacti bloom. The flower is a cactus flower. The thorns are also like the cactus tree. I've seen the flowers, but have not had time to capture the cactus flowers.
Agh, I'm talking a lot about cacti this time. In fact, I only posted a few photos of cacti. I shot these photos using a smartphone camera plus an assembled macro lens. I tried to photograph the cactus spines up close, only a few centimeters maybe even closer. For those who are curious, of course you can investigate it in the photo information.
This cactus is an ornamental plant belonging to my wife. He had been growing it in a small pot for a long time. I just looked around, because if I stare at the cactus for too long, then I can't stand to shoot the plant with whatever camera I have in hand. Agh, I hope this post gets a place in the hearts of cactus lovers.