This slow-growing succulent from the West Indies can reach 6 ft (1.8
m) in cultivation.
The fleshy, erect stems change direction at each node, hence the
name zigzag plant.
The leaves are mid-green and sprout from the stems in two rows,
resembling ribs on a backbone.
Variegated cultivars are popular.
Showy red bracts encase small, scarlet flowers.
The stems, when cut, secrete a poisonous milky sap.
Cultivation: They prefer well-drained soil and full sun or
Propagate from cuttings.