1、 Leaves

The leaves of black purple sunflower are opposite, sometimes upper or all alternate. Its leaves have petioles and usually have three veins after leaving the base

2、 Flowers

The flower of black purple sunflower is a head like inflorescence. The flowers are solitary or arranged in a corymbose shape. There are many small flowers in different shapes in the inflorescence, a layer of asexual tongue flowers in the periphery, and most bisexual flowers that can bear fruit in the center. The flowers of glossy flowers are unfolded and yellow in color; The tube part of the tubular flower is very short, the upper part is bell shaped, and the upper end is yellow, purple or brown, with 5 lobes

3、 Fruit

Achene oblong or obovate, slightly flat or with 4 thick ribs