So you said:
-flowers
-by the wayside and
-monocots.
I found the challenge amusing because, even if I am no plant specialist by far, I know that most grasses are monocots. And they grow by the wayside, so there you are:
Yes, theses are flowers. The first one is popular amongst butterflies.
I cheated for the identification. There is an app called FloraIncognita (
https://floraincognita.com/), you point your smartphone at a vascular plant (i.e. not mosses, lichens, etc...) and it tells you what it is (it uploads your image to their servers). It is free, without adverts. As it was developed from Technische Universität Ilmenau and the Max-Planck-Institut für Biogeochemie, it is designed for European plants but may be of some use in other continents, I don't know.
I am normally suspicious of apps requiring a server connection, but as this one is for scientific research, I think it is fine.