Nobody who has been for a walk in the countryside and crossed an arable farm field cannot have failed to notice this daisy flower and perhaps rather taken it for granted and not given a thought to its name; it is just a daisy. Its common name is scentless mayweed (Tripleurospermum inodorum) although it is also known as false chamomile.
Scentless mayweed is undoubtedly one of our most common weeds of cultivation but it is one of seven superficially similar species and it would be quite possible for the casual observer like me to dismiss them all as scentless mayweed without a second thought. Sea mayweed is found in a different environment but the others are all likely to be found on disturbed soils, usually that means farmland and as a result most of the six have declined considerably in recent times due to the extensive use of herbicides; somehow though, scentless mayweed soldiers on! It is a European species but it has spread to north America where it is considered an obnoxious weed.
The name mayweed is somewhat misleading as it actually flowers from April right through until November! It probably becomes most noticeable with its first real flush in May.