1. Chaenomeles belongs to Chaenomeles of Rosaceae. This genus includes Malus papaya and Malus rugosa, and several temperate woody plants are native to China. Their fruits are edible, medicinal, beautiful and ornamental. They are the papaya mentioned in traditional culture and poetry, such as the famous sentence "Give me papaya, give me Joan" in the Book of Songs. 2. Tropical fruit papaya (Caricaceae), a plant of the genus Caricaceae, originated in Southeast Asia and was introduced to China at the end of the17th century. Because its appearance is similar to that of China, it is named "Karika", which can also be used for food and medicine, but not for viewing. Other names: Chaenomeles sinensis, Chaenomeles sinensis, Chaenomeles sinensis, Chaenomeles sinensis, Chaenomeles sinensis, Chaenomeles sinensis, Chaenomeles sinensis, Chaenomeles sinensis, Chaenomeles sinensis, Chaenomeles sinensis, Chaenomeles sinensis, Chaenomeles sinensis, Chaenomeles sinensis, Chaenomeles sinensis, Chaenomeles sinensis, Chaenomeles sinensis, Chaenomeles sinensis, Chaenomeles sinensis peel off in pieces, with obvious backward traces. Leaf blade elliptic or elliptic oblong, 5-9 cm long and 3-6 cm wide, with acute apex, wedge-shaped or nearly round base, spiny serrations on the edge, glands on the teeth, glabrous surface, sparsely pilose along veins when young, and yellow-white fluff on the back when young; Petiole stout, long 1- 1.5 cm, covered with yellow-white fluff, with rod-shaped glands on both sides; Stipules membranous, elliptic-lanceolate, 7- 15 mm long, tapering at the top, glandular toothed at the edge, pilose along veins. Flowers solitary at the end of short branches, 2.5-3 cm in diameter; Pedicel stubby, 5- 10 mm long, glabrous; Calyx tube glabrous outside; Calyx lobes triangular-lanceolate, about 7 mm long, tapering at the top, with sparse glandular teeth at the edge, glabrous or sparsely pilose outside, densely covered with light brown villi inside, longer than calyx tube, and reflexed in fruit; Petals obovate and reddish; Stamens ca. 5 mm; Style about. 6 mm, pilose. Pear fruit is oval, long10-15cm, dark yellow, shiny, woody, slightly sour, fragrant and short. It blooms in April and bears fruit in September -65438+ 10. Papaya originated in China and is now cultivated in Shandong, Henan, Shaanxi, Anhui, Jiangsu, Hubei, Sichuan, Zhejiang, Jiangxi, Guangdong and Guangxi. Usage Papaya Begonia has bright flowers, good tree shape and few pests and diseases. It is a good tree species for landscaping. Can be planted in the corner of the garden wall, forest edge and other places, can enjoy flowers in spring, autumn can enjoy fruit. The oil content of seed kernel is 35.99%, the oil yield is 30%, there is no peculiar smell, it is edible and can be used to make soap. The fruit is cooked and made into candied fruit; It can also be used as medicine, but papaya has little effect. National Medical Products Administration banned medicinal use in 2003 because of its poor medicinal effect. Flowers can be used as seasoning for sugar sauce, and it tastes delicious. Bark contains tannin, which can be used to extract tannin extract. Wood is hard and can be used to make furniture.