1、 Leaf difference

The leaves of purple peony are compound leaves. The leaf outline is wide oval or oval, 15 to 20 cm long, with pinnate division. The lobes are lanceolate or oblong lanceolate, about 0.7 to 2 cm wide, and the petiole is about 4 to 8.5 cm long

Dahlia leaves have 1 to 3 times of pinnately divided, the upper leaves sometimes do not divide, the lobes are oval or oblong oval, the leaves are glabrous on both sides, and the underside of the leaves is grayish green

2、 Flower difference

Purple peony usually has 2 to 5 flowers per plant. The flowers grow at the top of branches or under armpits, with a diameter of 6 to 8 cm. There are 9 to 12 petals, and the color is usually red or red purple

Dahlia head, long peduncle, usually drooping, about 6 to 12 cm wide, involucral bracts are oval, with a layer of tongue flowers, and the color is white, red or purple