This is an evergreen low growing groundcover. It is drought resistant and it grows very fast. It thrives in a shade or semi-shade. It is an ideal plant for containers as it will spill over the edge. Mass plant under trees as the sage green colour of the leaves will look lovely in the dappled shade. It is named after Ernest Van Jaarsveld of Kirstenbosch National Botanical Garden. This is the larval host plant for the Tailed Black-eye butterfly. Named from the Latin ‘crassus’= and ‘ula’= diminutive referring to the fleshy succulent leaves.