Based on your description, it should be inferred that the purple back of the vegetable

Purple back of the vegetable: alias: red phoenix vegetable, two-color Panax quinquefolium, red cabbage, etc.

For the daisy family Panax quinquefolium perennial herbaceous plants, 50-100 cm high, the leaf blade above the green, the bottom of the drying of the purple, hairless, nutritious, high-value, and the growth of the purple back of the vegetable is healthy and strong, basically not subject to the Disease and insect damage

Look at the picture