Cussonia. Cussonia paniculata (Mountain Cabbage Tree) and Cussonia spicata (spiked cabbage tree) are probably the best known. Cussonia are a slow growing evergreen tree to 5m. Cussonia from South Africa are drought tolerant once established. Cussonia thyrsiflora, Cussonia sphaerocephala, Cussonia natalensis (Rock Cabbage) and Cussonia zuluensis are other species. Nurseries. Mail Order Nurseries, Specialist Nurseries,Retail Nurseries, Wholesale Nurseries, Garden Centers, Plant Nurseries.