Sounds like italian green beans.... they're wide and flatter than what we normally see, I've never grown them. As far as yellow squash and cucumber..... haha.... pm my husband, btravlin2.... he's grown several varieties and has alot to say about them!
they are also called Roma beans, in addition to Italian bean,, grown them for years, seeds are often hard to find, this year I got from amazon, decent price & arrived in 2 days. Try Garden of Eden [65 days] pole bean & good producer.
My opinion, regular old pinto bean is as great tasting a snap bean as there is. Just raid the pkg in the pantry and plant some. Vines become a tangly mess to pick from, always say I'm gonna give them something ro climb on, never get around to it.