When was the natural maturity of oranges introduced?
2. Citrus belongs to Rutaceae and Citrus. Sex likes warm and humid climate, and its cold tolerance is slightly stronger than pomelo, lime and sweet orange. The plants of Rutaceae and Citrinae are distributed between north latitude 16 ~ 37. It is a tropical and subtropical evergreen fruit tree (except Fructus Aurantii), and there are three genera of Fructus Aurantii, Citrus and Kumquat used for economic cultivation. Citrus grown in China and other countries in the world is mainly citrus.
3. Flowers are solitary or clustered with 2-3 flowers; Calyx irregularly 5-3-lobed; Petals are usually less than 1.5 cm long; Stamens 20-25, slender style, head-shaped stigma. The flowering period is from April to May, and the fruiting period is10-65438+February.