Well done, Alice, you have about half of them.
Bauhinia variegata, yes, plus the large white flowers to the right are B. variegata 'Candida'.
Limonium, yes, but it is L. perezii.
Pittosporum tobira, Matthiola incana, Bougainvillea, Lavandula dentata, Mesembryanthemum and Iris, yes.
Rosa banksiae, yes, plus R. banksiae 'Alba plena'.
Nigella, yes, but it's N. arvensis.
A couple more days and I'll fill in the gaps.