1. Corydalis

Corydalis Corydalis is a perennial herb. Its flower stem is short, its flowers are bisexual, its flower diameter is 2.5-4.0cm, and its fruit is an oval capsule. The suitable temperature for its growth is 10-15 ℃, which is cold resistant and difficult to grow at high temperature

2. Pansy

Pansy is a perennial herb, generally as a biennial greening plant, which is often planted in parks, flower beds and so on. Its flowers are larger, about 3.5-6cm in diameter, and its capsule is oval, 8-12mm long. The suitable temperature for its growth is 15-25 ℃, which is relatively cold resistant, and the root system can withstand the low temperature of - 15 ℃

3. Distinction

Both corydalis and Viola tricolor belong to Violaceae. Their shapes are very similar, but there are some differences

① Flower size: Corydalis 2-4cm, tricolor 3-6cm

② Flower shape: there are dark dots in the center of the flower of pansy, and the flower shape is more round, while the angle pansy has only a black straight line like a beard, and the flower shape is longer

③ Cold resistance: Corydalis Corydalis is more resistant to extreme temperature, heat and cold than Corydalis corydalis