Sium suave

Family	Apiaceae (alt. Umbelliferae)
Scientific name	Sium suave Walter
Synonyms	Apium cicutifolium (Schrenk) Bentham & Hooker ex Forbes & Hemsley; Cicuta dahurica Fischer ex Schultz; Critamus dauricus Hoffmann; Drepanophyllum heterophyllum (Greene) Koso-Poljansky; Drepanophyllum lineare (Michaux) Koso-Poljansky; Falcaria dahurica de Candolle; Sium cicutifolium Schrenk; Sium cicutifolium Schrank forma angustifolium (Komarov) H. Wolff; Sium cicutifolium Schrank forma latifolium (Komarov) H. Wolff; Sium cicutifolium Schrank forma tenue Komarov; Sium cicutifolium Schrank var. angustifolium Komarov; Sium cicutifolium Schrank var. heterophyllum (Greene) Jepson; Sium cicutifolium Schrank var. latifolium Komarof; Sium cicutifolium Schrank var. lineare (Michaux) H. Wolff; Sium diversifolium H. Wolff; Sium floridanum Sium heterophyllum Greene; Sium lineare Michaux; Sium lineare Michaux var. intermedium Torrey & A. Gray; Small; Sium formosanum Hayata; Sium nipponicum Maximowicz; Sium ovatum Yatabe; Sium rugosum Rafinesque; Sium suave Walter forma ovatum (Yatabe) Kitagawa; Sium suave Walter subsp. nipponicum (Maximovicz) Sugimoto; Sium suave Walter var. floridanum (Small) C. F. Reed; Sium suave Walter var. nipponicum (Maximovicz) H. Hara; Sium suave Walter var. ovatum (Yatabe) H. Hara; Sium turfosum H. Wolff
Common name	(Japanese common name) numa-zeri (ヌマゼリ, 沼芹 [meaning: swamp water-celery]), numa-zeri (トウヌマゼリ, 唐沼芹 [meaning: Chinese swamp water-celery]), numa-zeri (ヒロハヌマゼリ, 広葉沼芹 [meaning: broad leaved swamp water-celery])
	(English common name) hemlock water parsnip, water parsley
Distribution	(Japan) Hokkaido, Honshu
	(Other nations) Russia, Korea, China, Taiwan, Canada, USA
Habitat	Swamp
Chromosomal number	2n=12
Description	Plants 60-100cm tall. Leaves 7-17 leaflets (upper leives: sometimes 5 leiflets) each 3-10cm long, 1-2cm wide. Flowers white, flowering in July to September. Fruits 3-3.5mm long. Perennial plants.
Reference	Sium suave Walter
	Sium suave Walter
	Sium suave Walter
	Controlled regeneration of cotton plants from tissue culture (US Patent 4672035/1987)
	Skin care soap (Japanese Patent JP2000044997)
Note	Many Japanese authors had described that Sium suave Walter var. nipponicum (Maximovicz) H. Hara (syn. Sium nipponicum Maximovicz) has 7-9 leaflets and Sium suave Walter var. suave has 7-17 leaflets. However, I confirmed Sium suave var. nipponicum which has over 10 leaflets in the Ohsaka City University Botanical Garden. The observed plant has been identified as Sium suave Walter var. nipponicum (Maximovicz) H. Hara and cultivated by the Ohsaka City University Botanical Garden. Therefore, there is no obvious difference between Sium suave var. nipponicum and Sium suave var. suave. I think that Sium suave var. nipponicum is a synonym of Sium suave var. suave.

July 2008 at Ohsaka City University Botanical Garden	July 2008 at Ohsaka City University Botanical Garden	July 2008 at Ohsaka City University Botanical Garden

July 2008 at Ohsaka City University Botanical Garden