Longan, also known as longan, is an evergreen tree and tall.
Petiole 15-30 cm or longer; Leaflets are 4-5 pairs, rarely 3 or 6 pairs, thin leathery, oblong-elliptic to oblong-lanceolate, and both sides are often asymmetrical.
Inflorescence large, multi-branched, terminal and axillary, densely stellate hairy; Pedicel short; Sepals are nearly leathery, triangular-ovate, about 2.5 mm long, and are covered with brownish yellow fluff and fascicular stellate hairs on both sides; The petals are milky white. Bloom in spring and summer.
The fruit is nearly spherical, with a diameter of 1.2-2.5 cm, usually yellowish brown or sometimes grayish yellow, slightly rough in appearance, or with a few slightly convex nodules; The seeds are dark brown and shiny, all wrapped by fleshy aril, and the fruit is in summer.
Longan meat contains whole sugar, glucose, tartaric acid, protein, fat, vitamin C, vitamin K 196.6 mg, vitamin B 1, B2, P and so on. And various amino acids, saponins, X- glycine, tannins and choline.