Green in black and white

For some reason, a message came up saying that I already posted a photo on January 29. Yes I had, and I took this photo today, so I'm not sure what that was about. 
It's been snowing all day, so I didn't take the camera outside. This lettuce leaf has interesting shapes in it, I thought, and it's green, so that's my entry for the MM theme of "green but in black and white."  Thanks to heanku for hosting MM this month.