The first one was about 4" in Dia. it is not a dandelion. 2nd is just a very tiny little flower in the grass. 3rd is a cucumber flower about the size of a nickle. 4th is a mandevilla. 5th is a Rose of Sharon
Your comment in Original Post states that first subject is 4-inches across. That is definitely NOT a field captured at Minimum Focusing Distance. These are nice close-up photographs, but none appear to be 1:1 magnification macro-photographs.
Tom, these are some nice closeups. And as this is a closeup site you did very well. I wonder what that first one is. 4" is too small for most that I can think of with that spent stem.