Pictorial guide to the flora of the British Isles

Home ⟩ Pictorial Guide ⟩ Apiaceae / Umbelliferae ⟩ Sium latifolium / greater water-parsnip

Sium latifolium L.

greater water-parsnip (Apiaceae / Umbelliferae)

 SpreadBias within British IslesDirection of bias
RestrictedSlight tendencySE
Plant Atlas 2020
BSBI Distribution Map

Sium latifolium is a tall perennial plant of waterlogged ditches; it is found in scattered areas of Ireland and southern and eastern England.

Oxford (VC23: Oxfordshire); 2018-07-26

 greater water-parsnip / Sium latifolium: _Sium latifolium_ is a tall perennial plant of waterlogged ditches; it is found in scattered areas of Ireland and southern and eastern England.

The stems of Sium latifolium have 7 rounded grooves, and the leaflets are tapered to the base or slightly stalked.

Oxford (VC23: Oxfordshire); 2018-07-26

 greater water-parsnip / Sium latifolium: The stems of _Sium latifolium_ have 7 rounded grooves, and the leaflets are tapered to the base or slightly stalked.

The bracts at the base of the umbel have broad white borders in Sium latifolium, and the fruits have conspicuous tall ridges when mature, unlike Berula erecta.

Oxford (VC23: Oxfordshire); 2018-07-26

 greater water-parsnip / Sium latifolium: The bracts at the base of the umbel have broad white borders in _Sium latifolium_, and the fruits have conspicuous tall ridges when mature, unlike _Berula erecta_.

All images copyright © Christopher J. Dixon unless otherwise indicated.

L-R: Bidens tripartita, Melilotus officinalis, Mimulus guttatus, Thalictrum flavum, Ranunculus peltatus, Anchusa arvensis, Malva alcea, Lolium perenne