Apium nodiflorum, (L.) Lag.

2. A. nodiflorum (L.) Lag. View in CoL , Amen . Nat. 1: 101 (1821)

( Helosciadium nodiflorum (L.) Koch ).

Procumbent or ascending perennial up to 100 cm. Stems hollow, rooting at the lower nodes. Leaves 1-pinnate, segments 10-60 mm, 7-13, lanceolate to ovate, serrate and often somewhat lobed. Peduncle usually shorter than rays, often almost absent; umbels leaf-opposed. Rays 3-12. Bracts usually absent, rarely 1 or 2; bracteoles 5-7, ovate or lanceolate, with a white, membranous margin. Fruit 1-5-2 mm, longer than wide, ovoid. 2n —22. Wet places. Much o f Europe, particularly in the west; distribution uncertain owing to confusion with 3. Al Az Be BI Br Bu Co?Cr Ga Ge?Gr Hb He Ho Hs It?Ju Lu?Rm Sa Si TTu.