Description: A small native species of wet ground, similar to the slender club-rush (Isolepis cernua) but with a bristle-like projection of what appears to be the stem (but which is actually a bract) beyond the tiny flower spike; common and widespread across the whole of Northern Ireland.

All names: Isolepis setacea (L.) R.Br.; Scirpus setacea L.; Scirpus setaceus L.

Distribution Map from NBN: Isolepis setacea at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Isolepis setacea at iNaturalist World Species Observations database.