Name: Sandy B. Ford River Twp, Michigan UP (Zone 4b) (Zone 4b-maybe 5a)
I'd say it's definitely not chard... and the leaves seem darker and heavier than any Michihli type that I've grown; maybe just one of the savoyed "regular" cabbages? (but which hasn't formed a head yet, obviously)
“Think occasionally of the suffering of which you spare yourself the sight." ~ Albert Schweitzer C/F temp conversion