This plant sprang up between my Marigolds, I've never had them in my garden, and at first I wasn't sure what it was, but upon investigation found that it is also a Marigold and a bit different to my 'normal' Marigolds, which are French Marigold (Tagetes), an American native in the same family as the daisy. This Calendula officinalis or Pot Marigold is edible and often appears on lists of attractive edible flowers. Most French marigold varieties are not edible, although I have mixed some of the petals in with my salads. Maybe it will seed and I'll have more this season.
