Fimbristylis cymosa, commonly known as tropical fimbry, or St. John's sedge,[2] is a sedge of the family Cyperaceae that is native to Australia.

The rhizomatous perennial grass-like or herb sedge typically grows to a height of 0.25 to 0.8 metres (1 to 3 ft).

It blooms between February and September and produces brown flowers.

[3] In Western Australia it is found near the coast, on dunes and behind mangroves in the Kimberley region where it grows in sandy-clay alluvium around basalt or sandstone rocks.

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