Choy Sum: Burmese
(Brassica rapa var. parachinensis )

Choy sum is a cultivar of Brassica rapa, a species of vegetable that includes a wide range of subspecies including turnips, bok choy, and napa cabbage. Choy sum is a leafy green also know as Chinese flowering cabbage. It is eaten widely around the world. The shoots and young leaves can be stir-fried, boiled, or steamed, and contain Vitamin A, calcium, potassium, and folic acid. Growing conditions are very similar to mustand green. Harvested 30 to 50 days after sowing. 

Smaller leaves. From the Irrawaddy Delta region of Myanmar.