Around 80 species make up this genus of evergreen shrubs and small trees in the Proteaceae family endemic to South Africa. They have spirally-arranged leaves, sometimes covered in silky hairs, and dense clusters of flowers often surrounded by showy bracts. On female plants, the flowers are followed by woody cone-like seed heads. Members of this genus are extensively cultivated and hybridised with many varieties available. They are best grown under glass but may survive in mild climates given shelter and Winter protection.