Sium suave

Sium suave
Conservation status
	; Secure (NatureServe)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Apiales
Family:	Apiaceae
Genus:	Sium
Species:	S. suave
Binomial name
	Sium suave; Walter (1788)
Synonyms
	Apium cicutifolia (Schrank) Benth. & Hook.f. ex F.B.Forbes & Hemsl. (1887) ; Apium lineare (Michx.) Alph.Wood (1870) ; Cicuta davurica (Hoffm.) Fisch. ex F.Dietr. (1826) ; Critamus dauricus Hoffm. (1816) ; Drepanophyllum heterophyllum (Greene) Koso-Pol. (1914) ; Drepanophyllum lineare (Michx.) Koso-Pol. (1914) ; Falcaria dahurica DC. (1830) ; Sium californicum Baill. (1879) ; Sium cicutarium W.H.Baxter (1850) ; Sium cicutifolium Schrank (1789) ; Sium floridanum Small (1933) ; Sium formosanum Hayata (1921) ; Sium heterophyllum Greene (1890) ; Sium lineare Michx. (1803) ; Sium nipponicum Maxim. (1873) ; Sium ovatum Yatabe (1891) ; Sium rugosum Raf. (1830) ; Sium tenuifolium Muhl. (1813) ; Sium turfosum H.Wolff (1921) ; Siumis heterophyla Raf. (1838) ;

Sium suave, the water parsnip or hemlock waterparsnip, is a perennial wildflower in the family Apiaceae. It is native to many areas of both Asia and North America. The common name water parsnip is due to its similarity to parsnip (Pastinaca sativa) and its wetland habitat. The alternate common name hemlock waterparsnip is due to its similarity to the highly poisonous spotted water hemlock (Cicuta maculata).