argentine toothpick or stetsonia coryne cactus with tree-like appearance

argentine toothpick stetsonia coryne cactus treelike ap xeriscaped road shoulder appearance succulents desert rocks arizona cloudless spring sky spines ribs large tall grown long needles xeriscaping plants tree nature natural street sidewalk floral flora resilient drought tolerant green blue dark branching stems fence city town urban landscaped american america southwestern phoenix tucson outdoors morning sunlit vertically