Plant growth characters of Chinese kale (Brassica oleracea L var alboglabra)

Plant growth of eighteen cultivars of Chinese kale cultivated in Japan, Taiwan, China, and Thailand was studied on their morphological characters. Morphological characters, such as petal colour, leaf colour and leaf shape were classified into five groups: W-A; petal colour is white and leaf colour is deep green. Leaf shape is orbicular or ovate with rugose. W-B; petal colour is white, leaf colour is deep green and leaf shape is ovate or elliptic. W-Y; plant shape is similar to W-B, however, there were two types of plant with white or yellow colour petal. Y-A; petal colour is yellow, leaf colour is light green and leaf shape is orbicular. Y-B; petal colour is yellow, however, leaf colour is slightly deep green, and leaf shape is ovate. Cultivars of Y-A and Y-B were cultivated in Taiwan.