Petunia leaves have short stalks or are nearly sessile, the shape of the leaves is oval, the top is sharp, the base of the leaves is broad wedge or wedge, the whole leaf, 3 to 8 cm long, 1.5 to 4.5 cm wide.
The leaves of Petunia are broadly ovate or nearly round, with deep or shallow 3-lobes, about 4 to 15 cm long and about 4.5 to 14 cm wide. The base of the leaves is round or heart-shaped, and the petioles are 2 to 15 cm long.
Petunia flowers are solitary in the axils of the leaves. The pedicel is 3 to 5 cm long, the calyx is 5 deep cracks, the lobes are strip-shaped, about 1 to 1.5 cm long, and about 3.5 mm wide. The top of the petals is blunt, and the colors of the flowers are white, purple or various red.
Petunia flowers are axillary, single or usually 2 on the top of the peduncle of the inflorescence. The peduncle is different in length, the Corolla is funnel-shaped, and the color is blue purple or purple red.