EA, clover and oxalis look a lot alike when they're not flowering, but they're different species. Clover is Trifolium
and oxalis is Oxalis
I've had both pop up as volunteers in my pot plants, so understand the confusion. Common names such as 'shamrocks' don't help much either.
The flowers are quite different though and although clover's good bee forage and a valuable pasture species, being able to fix nitrogen in the soil, I don't know about oxalis. I'm glad to hear that some oxalis are tasty - there had to be a silver lining there somewhere.
Sorry I can't figure how to put photos in here, but a quick search should give you examples of respective flowers to compare.