BrownEyedGirl
Favorite Answer
Bok choy has a white stem that resembles celery without the stringiness, and dark green, spinach-like leaves that are tangy and sweet. The bottom ones are bok choy. The top picture is Shanghai bok choy with its pale green stem; very similar taste but smaller. It is sometimes called baby bok choy.
paskell
Bok Choy Pic
Anonymous
Both are bok choy or chinensis variety. The bottom white stem with slightly curly leaf the Chinese usually called it siew pak choy or white bok choy which you can find a dwarf (with short white stem) and tall long white stem bok choy. The top picture bok choy is also called bok choy with a pale green stem.
Pheby
The top one is not Bok Choy. It is Shiu Tong Choi. The bottom one is call small Bok Choi. My Asian friend taught me about Asian vegetables.
Tim
They are both bok choy, just different varieties. The one on the bottom is most commonly seen. I was told that the name bok choy translates simply to 'white vegetable'.