Pedilanthus tithymaloides devil’s backbone This plant comes in a 4" pot. You will receive a plant similar to the plants pictured. The plant produces tiny scarlet flowers in late spring or early summer. Pedilanthus tithymaloides is commonly called devil’s backbone in reference to the zigzag stems that purportedly resemble a spinal column. This clump-forming succulent shrub or subshrub will grow in nature to 6’ tall and to 3’ wide. Indoors, it more typically grows to 2’ tall. $7 each 4” pot, 3 pots in stock.