Lemon, grapefruit, apple, pear, guava and cherry are low-sugar fruits.
1, lemon: Lemon is also called lemon fruit, foreign lemon, beneficial mother fruit, etc. Small trees with few or nearly no thorns, dark purple leaves and flower buds, thick papery leaves, oval or oval. Single flowers axillary or few flowers clustered. The fruit is oval or ovoid, with thick, usually rough, lemon yellow, sour to very sour juice, small, oval, pointed seeds, smooth seed coat, milky white cotyledons, usually single or multi-embryo.
2. Grapefruit: distributed in the south of the Yangtze River in China and Southeast Asia. Its twigs, leaf backs, pedicels, calyx and ovary are all pilose, and its tender leaves are usually dark purple-red, flat and angular, with thick leaves, dark green, broad oval or oval. Racemes, sometimes with axillary single flowers, with pale purple buds and thin milky white; Calyx irregularly 5~3-lobed, style thick and long, stigma slightly larger than ovary.
3. Apple: Native to Europe, Central Asia and West Asia, North America, China and Xinjiang. It is 15 meters high, the trunk is grayish brown, and the twigs are densely villous and purple-brown when they are young; The leaf sequence is simple, alternate, oval to oval, with obtuse serrations and dark green. The white ribbon is flushed, the pedicel and calyx have gray hairs, the calyx leaves are long and pointed, and the fruit is slightly flat and spherical. The flowering period is from April to June, and the fruit period is 7- 1 1 month.
4. Pear: Usually the variety is a deciduous tree or shrub. Very few varieties are evergreen, and the leaves are mostly oval, and the size varies from variety to variety. Flowers are white, or slightly yellow and pink, with five petals. The fruit has a round shape, but also a thin base and a thick tail, which is commonly known as "pear shape". The pericarp colors of different varieties are quite different, including yellow, green, yellow with green, yellow with yellow in green, yellow-brown, green-brown, reddish-brown, brown, and some varieties are purplish red.
5. Guava: Native to South America. China is cultivated in various parts of South China, and some species are wild, reaching the Anning Valley in southwest Sichuan in the north. It is born in wasteland or low hills, and its fruit is edible, and its leaves contain volatile oil and tannins.
6. Cherry: mainly distributed in Europe, Asia and North America. Born in hillside forests, forest margins, bushes or grasslands. Cherry has been cultivated for a long time in China, and there are many varieties, which can be used for eating and making cherry wine. In addition to fresh food, it can also be processed into cherry sauce, cherry juice, canned cherry, preserved fruit, wine, etc., with brilliant red color and almond-like aroma, which makes people intoxicated.