A few clues would be nice.
For example, where is the side of the road? (The US is a biiiiig place.)

North Ga - in the shade - the flowers are round pinky- purple with chartreuse tiny " dots " on the end. So pretty- there are many beautiful native - I guess weeds growing close by - lyre leaf sage, cosmos, morning glories - & these ... Will post pics. Thank you for the kind reply.

I truly love this delicate, sweet flower....

The first one is a Mimosa I think 'Touch me not"

That's so weird, nature freak- When I was walking this am - I thought it looks like a mimosa ... Thank you !

I believe your second picture is a Butterfly Pea.

Googled that ! Ding ! Ding! Ding ! Bravo, TuckerOne ! Clitoria Mariana !!! Thank you so much !

Your first one might be Sensitive Briar, a member of the Mimosa family.

The last one perhaps look into the Meadow Beauties, Rhexia family.

Thanks Garden2Garden ! All 3 have now been id'ed !!!! Can't thank you all enough !