This tree-like perennial succulent has whorls of branches that have 6 rounded ribs and forms an upright tangled appearance. It has small greyish thorns on the ribs and the yellow flowers appear terminally on the stems during late summer.

Hardiness zones 9 to 11 

Euphorbia triangularis is naturally found in South Africa growing in an open sunny position in well drained poor sandy to stony soils that are moderately fertile with a pH 5-6 and tolerates drought and high temperatures but is frost tender. 

This succulent is grown for its habit and is planted in succulent or arid gardens as a specimen or is used in botanical collection. It establishes from cuttings in 3 to 4 years and is suitable for inland or exposed coastal or positions but may be difficult to obtain from nurseries as it is not commonly cultivated as an ornamental plant. ID 1903

Euphorbia (yoo-FOR-bee-uh) triangularis (try-ANG-gew-LAH-ris)

Euphorbiaceae (yoo-for-bee-AY-see-ee)
Spurge Family