Our cafeteria has a decent salad bar. It offers the choice between two bins of lettuce. One is strictly iceberg and the other is a mixture of more-exotic kinds. I’m usually fill up on the latter and am generally pleased with the mix. There is one green, however, that I don’t understand at all (see picture). It has a faint bitter taste and the texture of a young shrub. What is this? Is this some sort of weed? Does anybody actually like this? I eat around these and a little pile is left at the end of my lunch.