close-up of a white dragon fruit plant (selenicereus undatus)

close-up white dragon fruit plant selenicereus undatus detailed small spines characteristic fleshy green stems dragonfruit cactus tropical stem closeup nature exotic agriculture horticulture botany spiky growth organic texture outdoor desert succulent garden tropicalplant nutrition vibrant wild natural edible fruitplant botanic tropicalfruit thorns environment healthy ecology flora species fresh exoticfruit prickly biology vegetation leaf lush rural wilderness nutrient cultivation thorny gardening