Limiting the growth of herbs and dwarf shrubs by low illumination under the canopy of forests in the south of the Moscow region

The study of light conditions under the forest canopy was conducted using the hemispherical photography method. It was shown that light under canopy below 0.75% of above canopy solar radiation is insufficient for the survival of green plant shoots. Within the range of 0.75–1%, isolated shoots of: Aegopodium podagraria, Ajuga reptans, Carex pilosa, Oxalis acetosella and Pulmonaria obscura. Among the studied species, the most light-sensitive were the ephemeroids Anemonoides ranunculoides and Corydalis solida.