Sium is a genus of flowering plants in the family Apiaceae. It is widely distributed across Europe, Asia, Africa, and North America.Sium. Flora of China. Plants of this genus are commonly called water parsnips.Sium. Integrated Taxonomic Information System (ITIS).Spalik, K., et al. (2009). Generic delimitations within the Sium alliance (Apiaceae tribe Oenantheae) inferred from cpDNA rps16-5'trnk (UUU) and nrDNA ITS sequences. Taxon 58(3), 735-48.Spalik, K. and S. R. Downie. (2006). The evolutionary history of Sium sensu lato (Apiaceae): dispersal, vicariance, and domestication as inferred from ITS rDNA phylogeny. American Journal of Botany 93(5), 747-61.
These are perennial herbs, including some fully aquatic plants and some species that grow near water. The branching stem roots at the nodes. The lower leaves are pinnate, divided into leaflets. They are borne on petioles that sheath the stem at their bases. The inflorescence is a compound umbel of flowers with white petals.
Species Ten species are accepted: Sium crispulifolium Sium latifolium – wideleaf water parsnip, great water parsnip Sium latijugum Sium medium Sium ninsi Sium serra Sium sisarum – skirret Sium suave – common water parsnip, hemlock water parsnip Sium tenue Sium ventricosum
Formerly placed here Berula bracteata (as Sium bracteatum ) – jellico, large jellico Berula burchellii (as Sium burchellii ) – dwarf jellico
References
External links GRIN Species Records of Sium. Germplasm Resources Information Network (GRIN). Sium. The Jepson eFlora 2013.