Tall, erect, sparsely branched plant. Stems hollow and grooved, often constricted at the nodes. Flowers usually white, occasionally pink in terminal umbels that usually have 4 to 10 rays. These become markedly thickened when in fruit.

Terminal umbels, with peduncles longer than rays; segments of mid-stem leaves with linear lobes; most umbels with no bracts; stems very thin walled and hollow

It is nationally scarce and locally rare and therefore a specimen should not be taken.  Take detailed field photos and submit to NatureSpot as soon as possible; and if you think you have found it in a new location, inform the County Recorder as soon you can. (RPR)

Wet grassland, and in wet brackish places near the coast.

Flowers in June and July.

Perennial.

This is a nationally scarce species

In the Flora of Leicestershire (Primavesi and Evans 1988) it was found in 2 of the 617 tetrads.

In the current Checklist (Jeeves, 2011) it is listed as Native, and recorded from 6 localities, but recently only from floodplain grassland along the River Soar in Loughborough.