I'm leaning towards weed, but it just doesn't seem malicious enough to be a desert weed. Desert weeds always seem to have some sort of bite.
In other garden excitement, remember these guys?
About a day later they were kindly relieved from their leaves. Now I can't decide who to blame. Ada has left the garden alone for the most part, but she is a devious creature. I don't put it past her ability to carefully remove 1inch leaves one by one if the fancy took her. Or do you think a little bunny wandered off the golf course? Then there are our six legged friends to take into account as well.
I was so proud of the solitary plant that managed to keep on fighting despite its balding state. Then the criminal herbivore struck again, successfully navigating my tomato cage barrier