1、 Leaf difference

The leaves of Echinacea vulgaris are opposite double pinnate compound leaves, with deep cracks, lanceolate lobes, short tips, rough edges and wide leaves

The leaves of Rhododendron are basal, about 10 to 30 cm long, with long petioles, grayish green leaves, pinnately fine cracks, variable shapes of lobes, linear sharp, oblong sharp or blunt oblong, spoon oblong

2、 Flower difference

The flowers of echinacea are large and brightly colored. The tongue flowers are pure yellow, golden or orange. The tubular flowers in the center of the disc are obviously prominent in the disc, yellow or maroon

The flower of Rhododendron is solitary at the top of the stem and branches. The pedicel is 5 to 15 cm long. After flowering, it is cup-shaped, the edge is wavy and reflexed, and the flower is usually yellow