a cactus in full plume with yellow green gray

acid areoles atacama blossfeldia brown cactaceae cacti cactus canada carbon desert dioxide driest dry full george gray greek green habitats herbivores latin leaves loghry malic mammillaria melocactus navada occur opuntia patagonia pereskia photosynthesis plant plume shape shapes spany spines stems succulents tainfall thickened transpiration trees tubully unilike water yellow