Glaucous Sedge - Carex flacca

Description

Creeping plant about 10 to 60cm tall. Leaves grey or dull green above, and glaucous beneath, and egg shaped, inflated, almost beakless fruits. Inflorescence has 1 to 3 male spikelets 10 to 35 mm long with purple brown glumes that have pale midribs, and 1 to 5 close set female spikelets 15 to 50 mm the lower drooping on long rough stalks. Female glumes 2 to 3 mm long purple black with pale midribs and edges and blunt tips.

Similar Species

A number of sedges look very similar and sure identification requires detailed examination of the leaves and flowers.

Identification difficulty
ID checklist (your specimen should have all of these features)

3 male spikes, three stigmas, scabrid utricles without a beak, lowest inflorescence pendent

Habitat

Wet places, damp ditches, etc.

When to see it

June to September.

Life History

Perennial.

UK Status

Common throughout Britain.

VC55 Status

Frequent in Leicestershire and Rutland. In the 1979 Flora survey of Leicestershire it was found in 246 of the 617 tetrads.

Leicestershire & Rutland Map

MAP KEY:

Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2025+ | 2020-2024 | pre-2020

UK Map

Species profile

Common names
Glaucous Sedge
Species group:
Grasses, Rushes & Sedges
Kingdom:
Plantae
Order:
Poales
Family:
Cyperaceae
Records on NatureSpot:
106
First record:
27/05/2000 (MBNHS;Steve Woodward)
Last record:
12/05/2025 (Calow, Graham)

Total records by month

% of records within its species group

10km squares with records

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