These vegetal gems were labeled “junior bok choy.” Turns out that this is a vegetal vendor category; the store I was in didn’t make it up. I would have called them mini bok choy, or perhaps age-challenged bok choy. Nah.
Anyway, quite tasty in the corruption of stir-fry we had on Saturday night, and tonight, too. (Skipped a night, there.) If WikiPee is correct, bok choy (a phrase that makes my spell-check blotto even though it’s in my standard digital dictionary) is a subspecies of Brassica rapa L., along with bomdong (put on your Korean hat?), napa cabbage (from a Japanese term, not the valley in Cali), and turnip.