Oranges is composed of: roots, stems, leaves, flowers and fruit. Small trees. Leaf blade lanceolate, elliptic or broadly ovate, variable in size, often with notch at apex, forked from base to near notch at midvein, margin at least upper half usually obtuse or crenate, rarely entire. Flowers solitary or in clusters of 2-3; Calyx irregularly 5-3 lobed; Petals usually less than 1.5 cm long; Stamens 20-25, style slender, stigma capitate. The leaves of citrus are evergreen single compound leaves, composed of leaf body and leaf wing. The wings are attached to the petiole. Citrus varieties vary in leaf size and shape. A group of roots consisting of the main root, lateral root, fibrous root and fibrous root bearing extremely short root hairs, collectively referred to as the root system. A striated or propagated plant without a taproot. The junction of trunk and root is called root neck. The trunk of aoranges is composed of a trunk, a main branch, and a lateral branch.

Shape, usually oblate to nearly round sphere, the skin is very thin and smooth, or thick and rough, pale yellow, red or deep red, very easy or slightly easy tear, tangerine pith was more or less, net-like, easy separation, usually tender, center pillar and often empty, dilute enrichment, gourd ladle capsule 7-14 disc, thin, thin cystic wall or slightly thick, soft or quite tough, juice cell spindle, usually short and enlargement, thin thin, pulp sour or sweet, or bitter, or otherwise specific odor; Seeds more or less, rarely seeded, usually ovate, apically narrowly pointed, basally rounded, cotyledons dark green, pale green, or interspersed with near milky white, chalazal, polyembryonal, rarely monoembryonal. Flowering from April to may, fruiting from October to December