Phedimus

Phedimus is a genus of flowering plants in the family Crassulaceae, commonly known as stonecrops. The genus is recognized by some taxonomic authorities as distinct from Sedum, while others retain those species in Sedum. As such, the circumscription of Phedimus varies among sources. The group includes herbaceous perennials that typically form low-growing mats or creeping stems, with fleshy, opposite leaves and panicles or umbels of small star-shaped flowers.

Phedimus species are native to temperate regions of Europe, Asia, and North Africa, with many cultivated forms popular in rock gardens and as groundcovers. They favor well-drained soils and sunny positions, tolerate drought, and are generally hardy to a range of climates, though cold or poorly drained areas can be challenging.

In cultivation, Phedimus is valued for its hardiness and ease of propagation. Many cultivated forms arise from species formerly classified as Sedum spurium and related taxa, and they are distinguished by leaf shape, growth habit, and flower color. Propagation is typically by stem or leaf cuttings, division, or layering.

Notable species frequently cited in horticulture include Phedimus spurium (formerly Sedum spurium), Phedimus aizoon (Sedum aizoon), and Phedimus kamtschaticus (Sedum kamtschaticum). The taxonomy within Crassulaceae continues to evolve as molecular studies refine genus boundaries and the treatment of related species.