1、 Blade difference

Gynostemma pentaphyllum usually has 5-7 leaflets, oval oblong or lanceolate, and the petiole is 3-7 cm long, dark green on the top and light green on the back. The leaves of Apocynum venetum are elliptic lanceolate to oval oblong, and the petiole is shorter than the former, about 3-6 mm long

2、 The difference between flowers

Gynostemma pentaphyllum is a panicle, the color of corolla is light green or white, with 5 deep cracks, and the lobes are ovate lanceolate. Apocynum venetum is a paniculate cyme, with purple red or pink corolla, cylindrical bell shape, and oval oblong lobes

3、 Seed difference

Gynostemma pentaphyllum seeds are egg shaped, heart-shaped and grayish brown or dark brown in color. The seeds of Apocynum venetum are oval and oblong, and the color is yellowish brown