Thanks for the pictures.
You are right the green is different. Mine is brighter than your salt. There are lots of tiny bubbles in the green glass if that helps identification at all.
I haven't really come across St Louis glass at all, is there somewhere I can research it online, or do I need to buy yet more books? What sort of age would these bowls be if we assume St Louis?
I must work on my photography skills, I do try really hard to get it in focus, but it just won't!