Orange (scientific name: Citrus × junos Siebold ex Tanaka) is a small tree in the Rutaceae family, belonging to the Citrus genus. Branches usually have thick and long spines, and new shoots and young leaf stalks are often sparsely hairy. The leaves are thick and papery, the wing leaves are inverted oval shaped, the top is round or blunt, gradually narrowing to the base with a wedge-shaped tip, the leaves are ovate or lanceolate, the base is round or blunt, the flowers are solitary in the leaf axils, drooping, and the flower stalks are short; Sepal cup-shaped; Petals white, fruit flat round or approximately pear shaped; The seeds are abundant, broadly ovate, plump, and have single or multiple embryos. It blooms from April to May and bears fruit from October to November.