Green Stem Pak Choi (Brassica rapa var. chinensis)
 
Also known as:
green baby pak choy, Shanghai Chinese chard, Shanghai pak choy

Mei Qing Choi, Hybrid #121		Petite Star, Hybrid #449		San Fan, Hybrid #299		Shanghai #059

In Asia this vegetable is called...

China:  bok choy, Chinese kang choy, ging cai, pak choi, Shanghai choy sum, Shanghai pak tsoi, paak tsai, xiao bai cai, nai pe tsai, qing cai, tai koo choi, you cai, yu tsai

Indonesia:  pecai, pecal, petsai, petsay, samho, sesawi putih

Japan:  chingensai, tasai, tatsoi

Korea:  bok choy

Malaysia:  sawi, sawi puhit

Philippines:  pechay, petsay

Sri Lanka:  kala gowa

Thailand:  ang chaithao, pakk kwang toong, phakkaat farang, phakkaet bai

Vietnam:  cai be trang, cai ngot trang nho, cai thia, cai thuong hai, hach us