Ah, OK. Hmm. I think we might have different Rumex species here! I'm pretty sure we have curly/yellow dock (R. crispus) and broad-leaved dock (R. obtusifolius) but not the ones you mention. They're OK eating, but I suspect more bitter and tough. Broad-leaved dock is also just invasive as heck here, so I should try eating it again. :-)

The oxalis is delightfully sour and tastes something like lemons. Great as a tiny snack, especially in hot weather. Absolutely loaded with oxalic acid though, I'm sure.