It has deciduous,[3] many-branched shrubs or trees.[4] The bush or tree can reach up to 10 ft.[5] The branches are dark or greyish brown and glabrous (smooth). The leaves are often at the ends of the branches and are opposite or alternate (arranged along the stem).[4] They are petiolate (have a stalk) and have a smooth blade. They have a slightly bluish tinge above and are light green beneath, with the midrib and pinnate lateral veins yellow beneath.