Looks like you got most of them, here are a few more

4. way to small to see but might be petunia
9. looks like an extreme closeup(remember wayne's world?) of
bouganviella
13. looks like Catharanthus roseus
15. Some species of nymphaea, most likely a tropical, based on the
color
17. looks like Coreopsis, judging by the large looking leaves,
probably C. grandifolia