Aquatic plants with large leaves and fresh green are growing in Hangzhou ponds. What are their names?

Thalictrum: Araliaceae, a perennial emergent herb.

The leaves are ovate-lanceolate, light gray-blue, with purple edges, 50 cm long and 25 cm wide. Compound racemes, small flowers, violet. White powder is attached to the whole plant.

The flower stalk can be more than 2 meters high, and the slender flower stem can be as high as 3 meters. The end of the stem has purple flowers, which are very special in shape like bait tied to a fishing rod.

Zailihua is an excellent greenhouse flower, which is native to tropical areas of the southern United States and Mexico. The flower stalk can be as high as 2 meters. It is an emergent flower with high ornamental value introduced to China.