Originally from the Malay Peninsula. Rhubarb (Latin name: nepheliumlappaceumL.) is a large tropical fruit tree of the genus Lesser of the family Sapindaceae, also known as lychee, lesser, red hairy fruit. The Malay word "rambutan" means "hairy thing". Mature rambutan fruits are not all red, but also yellow. Some rambutan seeds are about the size of a sesame seed. It tastes like lychee. The area planted with rambutan in China is relatively small, with only Baoting and Sanya on Hainan Island having large planted areas. The rambutan is one of the three domestically produced oligospermums in China, the other two being oligospermum and Hainan oligospermum. Evergreen trees, more than 10 meters high; branchlets terete, wrinkled, light gray-brown, only the tender part is rust-colored puberulent. Petiole 15-45 cm long, leaf rachis slightly thicker, wrinkled when dry; leaflets 2-3 pairs, rarely 1-4 pairs, thinly leathery, elliptic or obovate, 6-18 cm long, 4-7.5 cm wide, apical part rounded or slightly rounded, sometimes subacute, base cuneate, entire, glabrous on both surfaces; lateral veins 7-9 pairs, brownish-red when dry, raised only on the abaxial side, reticulation of veinlets slightly foveolate, visible on both sides when dry; Petiole ca. 5 mm. Inflorescences often much-branched, subequal or longer, rusty with short hairs; pedicels short; calyx leathery, ca. 2 mm long, lobes ovate, tomentose; no petals; stamens ca. 3 mm long. Fruit broadly ellipsoid, reddish yellow, spines ca. 5 cm long, 4.5 cm wide, 1 cm long. Flowers in early summer, fruits in early fall.