columnar cereus and alligator plants (bryophyllum daigremontianum) in xeriscaping

columnar cereus bryophyllum daigremontianum alligator plant devils backbone mother thousands crassulaceae kalanchoe daigremontiana succulent perennial tropical subtropical leaf edges grow growing fence fleshy lanceshaped leaves long stems sawtoothed curling clusters houseplant flora botany natural environment garden xeriscaping xeriscape upright vertically