Odd... I posted an answer previously.

They appear to be radishes. The one(s) with stem are bolting, the one at the bottom of the photo appears normal.

Some kind of radish.

thanks for the replies, i bought mustard greens seeds but these came up thats why i was a bit confused. I pulled it up and no there was no radish. I pickled the greens anyways lol, it tasted like whats it supposed to but the texture is different..very stringy and tough.

Look like mine Sher Li Hon

http://agrohaitai.com/leafveg/leafmustard/leafmustard.htm

It is used for pickled cabbage or sour cabbage

Well, mustard, radish , horse radish, turnips, .. are close relatives. So really, they are not that different in appearance and taste.

"It is used for pickled cabbage or sour cabbage"

Do you have a personal recipe JCTsai?

turnip greens. Maybe even the wilder types they can revert to...slightly coarse, hairy leaves. I had this in my veg. garden, too. The texture of the leaves made it inedible for me.

I notice various chinese and japanese mustards i grow... some of them have hairy leaves or stems on certain plants.