Often rather upright with whorls of yellow-green flowers.  Key features for identification are the colour of the mature inflorescence late in the season, or the anther length early in the season and the obtuse tepals. Lower leaves lanceolate, tapered to the base, upper leaves linear.

Good photographs of the whole plant in habitat, and details of the flowers required. (RPR)

Wet, nutrient-rich mud exposed in summer and autumn, most often in marshes and beside ponds and ditches, but also in clay- and gravel-pits and on damp disturbed ground.

In flower during June, July, August and September.

An annual, biennial or short-lived perennial.

Local and occasional in much of Britain.

Scarce in Leicestershire and Rutland, but may be increasing.

It is listed on the current VC55 Rare Plant Register (Hall and Woodward 2022) as Locally Scarce (i.e. present in 4-10 sites)