A happy memory

I once read a book with the location of the story in the South  of France.  There was a vivid description of the yellow flowers that blossomed in abundance.  There was a fiesta or celebration of some sort and it was either a love or an adventure story.  I remember mimosa being mentioned and ever since, I associate it with the yellow colour.  There is a beautiful plant with yellow flowers in my garden.  I have nicknamed it mimosa.  Guess what, when I went to France I forgot to find the real mimosa.