Name: Linda SE Houston, Tx. (Hobby) (Zone 9a) "Godspeed, & Good Harvest!"
Cindy,
I believe it was Fordhook.
Here're some online pics. Not all are chard, though, cause I see at least a couple of Bok/Pak Choys in the mix, LOL. But, the first row looks pretty much like the Fordhook.
It's a really pretty GREEN plant, too. Snow white ribs.