C. arborescens is well represented in cultivation by the typical form of subspecies arborescens, with thick orbicular leaves that have earned it the common name of silver dollar jade. Subspecies undulatifolia has more elongate leaves that are less fleshy and tend not to rest in one plane, giving rise to the subspecies epithet. It eventually grows to be a large shrub to 2 m similar to the jade plant, C. ovata. The form offered here has particularly glaucous leaves, very stout succulent branches and a natural bonsai-like aspect. Rooted cuts of HBG 84988, a plant collected by Ernst van Jaarsveld at the type locality, Sapkamma Station, E Cape, S. Africa. $8.
Published in the Cactus and Succulent Journal, Vol. 77 (2), March - April, 2005