Clive Stace in New Flora of the British Isles Edition 3 now considers this plant to be an Archeophyte (introduced before 1500 AD) having thought it was native in previous editions. He also suggest that it might better be considered as a sub species of Tripleurospermum maritimum (Sea Mayweed).

This is a common summer weed particularly of cultivated land where I find it in large numbers at the edge of crops. The finely divided leaves distinguish it from other daisy-like plants such as the closely related Tripleurospermum maritimum which has obviously succulent leaves.

Tripleurospermum inodorum is easily found throughout England, Wales and southern to mid Scotland. It is less common in the far north and north west of Scotland. It isn't as common in Ireland as in England but is still present in good numbers particularly towards the east.

Edge of sunflower crop in Alvanley Cheshire, 22nd November 2004

Added on December 30th 2004, updated 17th February 2012