Is this villain or hero, for instance? Those with manicured lawns will see it as an enemy, but the gourmets will recognise its food potential (have you tried blanched "Pissenlit" as the French call the Dandelion?). By any measure it is a very striking flower.
Talking of lawns, the other major threat to them is the humble Daisy. Here again a close look reveals a really beautiful flower.
This one is a bit more delicate - sometimes cultivated as a garden plant, though this particular specimen lives in the verge at the side of a public road. The diminutive but picturesque Violet.
Observed closely the flowers seem like a mix between the Iris and the Pansy.
Here's another photo from the same group:
Does anyone know what the little succulent plant in this picture is?
Just a few inches away is a clump of Anchusa (often confused with Borage). In some places round here it is a prolific "weed", but it looks great.
This one is Pulmonaria, aka Lungwort. It too grows all over the place, as a "weed". I think this plant must be one of only a few to have flowers of at least three different colours on the same plant simultaneously.
This one is a type of Dead-Nettle...
And finally, lest we forget...
The Forget-Me-Not, of course!
All these are in their own right beautiful flowers, but because they are a bit "pushy" and dare to grow where you may not want them to, they have been deemed undesirable weeds. Is that fair?