(1) four-horned rhombus class

'Yiwu rhombus'

Zhejiang Yiwu City local varieties. Central Zhejiang Province, greenhouse cultivation, harvested in early to mid-May, mu yield of 2000 kg or more; open field cultivation, harvested in early July, mu yield of 1000 kg or more. Leaf surface, petiole, leaf veins are green. Young fruit skin is thin, easy to peel, flesh is tender, sweet flavor, suitable for raw food, green and white skin, sharp corners, single fruit weight 15.6 grams. Strong branching, suitable for shallow water cultivation.

'Yiwu Ling'

'Water Red Ling'

Produced in Suzhou, Jiangsu, Hangzhou, Zhejiang, and the Jiaxing area. sowing in early April, harvesting young Ling in early August, harvesting the old Ling in late August and late October, mu yield 400 to 500 kilograms per mu. The petiole, leaf veins and pericarp are all water-red. The flesh contains more water, slightly less starch, sweet flavor, suitable for raw food, shoulder angle elongated flat stretch, waist angle in the long, slightly downward diagonal stretch, the fruit shape is larger, the single fruit weight of 15 to 20 grams, the ratio of fruit weight to meat weight is about 1.5:1. intolerant of deep water, not resistant to the wind and waves, suitable for planting in shallow water ponds, river bays.

'Water red rhombus'

'Shaobo rhombus'

Jiangsu Lixiahe area local varieties. early April sowing, mid-August to mid-October harvest, mu yield of 400 to 500 kg. Fruit skin green and white, shoulder angle is bigger, waist angle is sharp, skin is thin, fruit is small, single fruit weight 10 ~ 12 grams, fruit weight and meat weight ratio is about 1.55:1. suitable for planting in shallow ponds, river bay.

Shaobo Ling has a long history, famous, the legend says that when Emperor Qianlong traveled to the south of the Yangtze River, passing through Shaobo, ate Shaobo Ling, praised. Later, every year before the Mid-Autumn Festival, always select the best rhombus, as a tribute, overnight sent to Beijing, for the palace to enjoy. According to town records, after the founding of new China, the State Council had a special letter to Shao Bo sent some diamond seed to Beijing, put it in Zhongnanhai, for guests to enjoy, taste.

'Small white rhombus'

Produced in Jiangsu Wujiang, Suzhou and other places. early April sowing, early September to late October harvest, mu yield 300 to 600 kg. Flesh hard, containing starch, suitable for cooked food, green and white pericarp, shoulder angle slightly upward diagonal extension, waist angle elongated recurved, belly slightly elevated, fruit shape is small, single fruit weight of 7 to 8 grams, the ratio of fruit weight and meat weight of about 1.4:1. diamond plate is small, the stem and vine is tough, strong growth potential, strong resistance to wind and waves, growth of the adaptive range of wide, suitable for deep-water cultivation of the lakes and slopes.

'Big green rhombus'

Produced in Jiangsu Wujiang, Wuxian, Yixing, etc. Sowing in early April, harvested in early September to late October, more resistant to deep water, mu yield of 500 to 600 kg. Medium quality, greenish white pericarp, shoulder high, shoulder angle flat and thick, waist angle is also thick, slightly downward curved, large fruit shape, single fruit weight 20 to 25 grams. Fruit skin thick, fruit weight and meat weight ratio of about 2:1.

(2) two-horned rhombus class

'Grub rhombus'

Also known as the Wu Ling, wind rhombus, large curved horn rhombus, produced in Jiangsu, Zhejiang, and all over the South. early to late April sowing, early August to late October harvest, mu yield of 300 to 500 kg. Good quality, starch content. The pericarp is dark green, and the two horns are thick and long and recurved. Fruit shape is larger, single fruit weight of about 20 grams, but thick crust, fruit weight and meat weight ratio of about 2:1. ripe stalk is not easy to fall off, can reduce the number of times of harvesting. It can tolerate water depth of 2.5~3 meters.

'Rouge lozenge'

Also known as red lozenges, bat lozenges, produced near Nanjing. sowing in early April, harvested in late August to early October. The growth potential is weak, the leaf surface light green, the back russet. Fruit skin color has two kinds of red, green, two horns flat extension, the apex is obtuse, fruit shape medium, single fruit weight 13 grams or so. Resistant to water depth of only 1.5 to 2 meters.

'Rouge lozenge'

(3) Hornless lozenges

'South Lake lozenges'

Also known as round lozenges, monk lozenges, Yuanbao lozenges, hornless lozenges, produced in South Lake, Jiaxing, Zhejiang Province. sown in early April, late August to Late October harvest, mu yield of about 360 kg. Good quality, hard meat with japonica, green and white pericarp, young rhombus has four horns, late four horns degradation, only traces of the remaining, medium fruit shape, single fruit weight of 13 grams or so, thinner skin, fruit weight and meat weight ratio of about 1.5:1. Because easy to drop, fruit maturity must be harvested in a timely manner. Growth requires moderate water level, fertile soil. Heat-resistant not cold-resistant, weak resistance to wind and waves.

'Nanhu Ling'