close up of thorn on cactus tree the saguaro cactus carnegia gigantia is one of the most widely recognized s of the southw

across agave and area arizona background botanical botany cactus carnegia close closeup color concept copy desert detail dry flora found garden gigantia green growth large leaf macro most natural nature needle one plant prickly recognized saguaro sharp southwest space spikes spine succulent symbols texture thorn tree tropical usa widely