1、 Blade difference

The leaves of wrinkled papaya are oval to oval, and few are long oval, about 3-9 cm long and 1.5-5 cm wide, with sharp serrations at the edge. The petiole is about 1 cm long, and the stipules are herbaceous, renal or semicircular

The leaves of smooth skinned papaya are oval or oval oblong, about 5-8 cm long and 2.5-5.5 cm wide. The petiole is smaller than the former, about 5-10 mm. The stipules are membranous and ovate lanceolate

2、 The difference between flowers

Wrinkled papaya has 3-5 flowers clustered on two-year-old branches. The petals are obovate or nearly round, scarlet in color, and rarely light red or white

The flower of smooth skin papaya is solitary in the leaf axil, and the petals are obovate and light pink

3、 Fruit difference

Wrinkled papaya fruit is spherical or ovoid, about 4-6 cm in diameter, yellow or yellowish green

The fruit of smooth skinned papaya is long oval and dark yellow