pear cactus flowers

american arizona arizonian branches cactaceae cacti cactus close clouds cluster cochineal conservation conserve desert edible elongated environment epiphytes fiber fleshy flower flowers fruit fruits glochids green growth herb herbal horizontal juice juicy leaf leaves nopales nopalito oblong opuntia ornamental paddle pads pear plant prickly purple reddish slice soil southwest spikes spine spines stems succulent thorn thorns treatment tree tropical tuna vegetable wild xerophytes