a green cactus of the genus pilosocereus. taken in close-up on a light background

xerophyte thorn texture symmetry summer succulent spine spike sharp shadow resilience renewable protection prickly plant pilosocereus pattern needle nature natural macro light harmony growth green genus garden framing flora fern environmental ecosystem dry droughttolerant droughtresistant detail desert decoration conservation composition closeup cactus cacti botany botanical beautiful balance background arid aesthetic adaptation