cylindropuntia acanthocarpa, spiny cacti and other desert plants in rock desert in the foothills, california

southwest spiny cylindropuntia buckhorn acanthocarpa cactus fruit barbed yellow staghorn chollas spines cactaceae desert landscape cholla prickly arid arizona cacti bloom apple california chain coldresistant plants echinocarpa succulents dry engelmann 039 pear flora flower green hardy joshua tree mojave national park nature north america plant rock