Fimbristylis laxiglumis is a sedge of the family Cyperaceae that is native to Australia.

The annual grass-like or herb sedge typically grows to a height of 0.6 metres (1.97 ft) and has a tufted habit.

It blooms between March and April and produces brown flowers.

[1] In Western Australia it is found in the Kimberley region where it grows in black clay soils.

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