Electric lamp flower (Cobaea scandens Cav.) is a perennial twining herb, the whole plant is glabrous. 3 pairs of leaflets, oval or oblong, 6-9 cm long, 3.5-4 cm wide, petiole about 1 cm long, the lowest pair close to the stem, more or less ear-shaped or halberd-shaped, resembling stipules Shaped, tendrils branched; calyx lobes wide, nearly round, with small short tips; corolla about 5 cm long, campanulate, green-purple gradually turning purple. The capsule is about 4 cm long. The seeds are about 0.8 cm wide, thin and flat. Electric bulbs are native to Mexico.