Sedum (Hylotelephium) 'CORALJADE' orpine

Sedum

The genus Sedum is one of the largest genera in the family Crassulaceae, comprising more than 400 species native to a wide range of the Northern Hemisphere, from the Atlantic to the Far East and from arctic regions to subtropical mountains. The first scientific consolidation of the genus was made by Carl Linnaeus in 1753 in Species Plantarum, where he described European species based on their succulent leaves and star-shaped flowers. In the 19th century the genus became a subject of intensive botanical interest: Joseph Nelson Rose (1862–1928) and Nathaniel Lord Britton (1859–1934) studied North American species, while Alwin Berger (1871–1931) highlighted the marked differences between ground-covering species and tall, stem-forming ones. In the 20th century the genus expanded further thanks to European and Asian botanists who described new taxa from the Caucasus, Central Asia and the Far East. Individual groups differ according to local climate: European species are mostly low, mat-forming, often evergreen and flowering in spring or summer; Central and East Asian species exhibit later growth and flowering; North American taxa include alpine species as well as prairie forms adapted to drought and intense sunlight; southern Europe and Asia Minor host species with extreme tolerance to summer heat, which limit growth during the hottest part of the year.

Tall, stem-forming species were historically placed within the same broad genus Sedum, but already in the 19th century Alwin Berger (1871–1931) noted that these species differ significantly from low, mat-forming stonecrops in both morphology and phenology. Chloroplast DNA analyses later showed that the tall group forms a separate evolutionary lineage, while the genus Sedum as a whole is polyphyletic. Based on these results, Hideaki Ohba (*1948) reinstated the original genus Hylotelephium in 1995, which had a valid historical name, and authoritative databases therefore prioritise the name Hylotelephium telephium. 

Hylotelephium telephium is one of the longest-known and culturally most significant tall stonecrops of Eurasia. In northern Europe it was a common part of traditional gardens and open landscapes, and in folk medicine it was valued as a source of “living water” because its fleshy leaves were used as soothing poultices. Its horticultural importance stems from exceptional adaptability: it grows across a wide belt from the Atlantic to Siberia, tolerates poor soils, drought and frost, and its appeal is not limited to late summer flowering, as it often offers attractive foliage in several colours. When Asian species such as H. spectabile began to be cultivated in the 19th century, it became clear that H. telephium hybridises readily with them, producing plants with larger inflorescences, stronger structure and more vivid colours. These interspecific hybrids became the foundation of modern cultivars that dominate autumn perennial borders. They combine the robustness and cold tolerance of H. telephium with the showy flowers and late seasonal peak of H. spectabile.