Longan, (Latin name: Dimocarpus longan Lour.) also known as cinnamon, Puzzle, evergreen tree, tree body tall. 7 ~ August fruit ripe yellow-brown when picked. For the Sapindaceae plant, fruit for raw food or processed into dried products, meat, core, skin and roots can be used as medicine. Native to southern and southwestern China, longan is cultivated in many countries and regions of the world, such as: China, Thailand, Indonesia, Queensland, Australia, Hawaii and Florida in the United States.

Evergreen tree, usually more than 10 meters high, between as high as 40 meters, the diameter of the chest up to 1 meter, with the root of the board of the large trees; branchlets stout, puberulent, scattered pale white lenticels. Leaves with stipe 15-30 cm or longer; leaflets 4-5 pairs, rarely 3 or 6 pairs, thinly leathery, oblong-elliptic to oblong-lanceolate, often asymmetric on both sides, 6-15 cm long, 2.5-5 cm wide, apically mucronate, sometimes slightly obtuse-acuminate, base extremely asymmetric, upper side broadly cuneate to truncate, several parallel to leaf axis, lower side narrowly cuneate, ventral surface dark green, glossy, dorsal surface flourish green, both surfaces glabrous; lateral veins 12-15 pairs, raised only abaxially; petiolules usually not more than 5 mm long.

Inflorescences large, much branched, terminal and axillary near branch apex, densely stellate hairy; pedicels short; sepals subleathery, triangular-ovate, ca. 2.5 mm, tawny tomentose and bundles of stellate hairs on both surfaces; petals creamy white, lanceolate, subequal to sepals, puberulent only outside; filaments hispidulous.

Fruit subglobose, 1.2-2.5 cm in diam., usually yellow-brown or sometimes gray-yellow, outside slightly rough, or rarely with slightly convex tubercles; seeds tea-brown, shiny, all wrapped by fleshy aril. Fl. spring-summer, fr. summer. [1]