1、 Blade difference

The leaves of Solanum nigrum are oval to oval oblong, 4-8 cm long and 2-4 cm wide. The apex is acuminate, the base is wedge-shaped, and extends down to the petiole to form wings. Both sides have sparse pilose, sometimes glabrous. The leaves of Solanum nigrum are oval, about 2.5-10 cm long and 1.5-5.5 cm wide. The apex is short and sharp, the base is wedge-shaped, then broad wedge-shaped, and extends down to the petiole without wings

2、 The difference between flowers

Little flower Solanum nigrum is an umbrella, growing outside the axil, with 1-6 flowers. The flowers are small, white corolla, 5-lobed, and the lobes are oval lanceolate. Solanum nigrum is a scorpion tail inflorescence, with more flowers, up to 10. The color of corolla is white as the former, and the lobes are oval