Another plant that can be found in ordinary nature, as well as in the gardens of the city of St. Petersburg – DENSE CORYDALIS (Corydalis solida). This is a perennial plant that is found in clearings and clearings, in sparse shrubs, in river valleys.

Corydalis prefers rich soils with limestone, forms clumps. Corydalis is a spring ephemeroid: it blooms with the appearance of thawed patches, blooms for only a few days, and soon seeds pour out of the fruits onto the ground; by June, the aerial parts of the plant die off, a spherical tuber remains in the ground. A close view of Corydalis intermediate (C. intermedia) is included in the Red Book of the Leningrad Region.