longan (Dimocarpus longan Lour.) is a genus of Longan of the Sapindaceae family. Evergreen trees, usually more than 10 m tall; Branchlets stout, puberulent, scattered pale lenticle. Leaves with stipes 15-30 cm long or longer; Leaflets 4-5 pair, thinly leathery, oblong-elliptic to oblong-lanceolate, sides often asymmetrical; Petiole length usually does not exceed 5 mm. Inflorescence large, much branched; Pedicels short; Sepals subleathery, triangular-ovate; Petals opalescent, lanceolate, subequal to sepals, outside puberulent only; Filaments bristly short. Fruit subglobose, usually yellowish-brown or sometimes grayish-yellow, outside slightly coarser, or less tuberculate; The seeds are tawny and bright, all wrapped in fleshy arils. Flowering period between spring and summer, fruit in summer.