Description: This is a rather slender thistle with a broad wing to its stem, and a pale blue flower head. Most frequent around the coast in disturbed sandy soils, especially frequent in Co Down.

All names: Carduus tenuiflorus Curtis; Carduus pycnocephalus auct.

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

iNaturalist: Carduus tenuiflorus at iNaturalist World Species Observations database.