1、 Blade difference

Litchi tree has odd or even pinnate compound leaves, with 2-5 pairs of leaflets, opposite or alternate, leathery, oval or lanceolate, about 5-16 cm long and 2-5 cm wide, with acute or acuminate apex, round or wedge-shaped base and complete edge

Longan tree has even pinnate compound leaves, alternate, thin leathery, oblong or oblong lanceolate, similar in size to the former, and the apex is acute or slightly blunt

2、 The difference between flowers

Litchi trees are cymes arranged in a panicle. The flower color is yellow green

Longan tree is a panicle, clustered, miscellaneous, with 5 petals, and the color of the petals is yellow and white