A generation or so ago, people in Britain did know the names of everyday flowers, trees, birds and so on. Now they don't.
There've been lots of studies in the UK on what's known as the 'Nature Deficit' and the results are heartbreaking. For example, a few years ago they did a test on some primary school kids, showing them pictures of Pokemon creatures alongside some common British birds and animals. It turned out the kids could name the imaginary characters without any problem at all, but they failed to recognise even a robin or a blackbird. In another study, their parents fared no better.
What's even sadder is the updates to the Oxford Children's dictionary. In recent years, they removed words like 'acorn' and 'dandelion' to make room for 'vlog' and 'selfie stick'.
Now to your pictures. Sadly, kids don't learn about flowers at school. Off the top of my head: dandelion, some kind of nettle?, some kind of daisy?, don't know but it looks garlicky, poppies, lily of the valley, forget-me-not, thistle, probably a buttercup but not too sure. I also know the French names for those that I'm sure about.
How did I do?