Black bone tea belongs to shrubs, bark and roots are black, wood is very hard.
Red sandalwood is a kind of tree. Its trunk is straight, its bark is dark brown, it will be deeply split into rectangular thin pieces, and its sap is dark red.
Black bone tea leaves are very small, and alternate, chicken heart-shaped, leathery leaves, leaves are very green, its new buds are tender red.
Red sandalwood usually has 3 to 5 leaflets, usually oval or oval in shape, about 9 to 15 cm long.
The flower of black bone tea is very small, the color is white, usually grows in the leaf armpit.
The flowers of red sandalwood are yellow or with yellow stripes. The flowering period is from November to December.