Posted: 19/10/2014 at 11:53
Thanks everyone. Marguerite was the one I couldn't remember, which I should have as I have plenty in my garden, although it's often hard to tell between them, the chrysanthemums, corn daisies, and marigold varieties.
Also after researching the suggestions of DW and Norfolkdumpling, and looking at enlargements of my friend's photo', I'm sure it's a Sanvitilia. I think it's Sanvitalia speciosa 'Million Suns'. Everything fits for this ID, whereas the Melampodium has quite different leaves, is a lot taller (24" - 36") and is a mounding rather than a spreading plant. Thanks again for everyone's help, my friend will be very pleased.