It is a variety (hybrid / selected line) of caixin (Chinese flowering cabbage / Brassica vegetable).
It carries the name “White Stem King”, emphasizing its characteristic white petioles / stems (“white stem”) in contrast to green stems in other varieties.
The “CX8” is the variety designation (i.e. White Stem King CX8).
Late flowering / slow bolting: the variety is bred to delay flowering, allowing a longer period of vegetative growth before the plant bolts.
Leaves / foliage: medium green, thick, oval in shape.
Petiole / stem: round, thick, white in color (thus “white stem”) rather than green.
Plant height: around ~ 35 cm at maturity for harvest of the stem / leaf portion.
Adaptability & tolerance: good rain tolerance, wide adaptability to open field conditions.
Malaysia