It's a miniature bok choi..only gets 4 to 5 inches tall. seedling to harvest in 30 days.
I buy them sometimes at Tim's Oriental Market on Bandera & Huebner on Thursdays when they get their vegetables in from Houston. They are cute & tasty
Then I saw that you can get the seeds really cheap, so I want to try to grow them. The veggies at Tim's aren't pricey, but the gasoline to get there is.
WoW! I know exactly where Tim's is. I go there to get my kimchee base and other SE Asian goodies! I was just at the McCoys across the street today.
Try a raised bed or cold frame with a cover. If you are north of the city, you know we get cold snaps that will destroy many unprotected plants. If you are in the city limits....well, you all seem to have a different climate. I have trouble with citrus, banana, and loquat, but they grow fine in town.