Inflorescence hawthorn indicators of section Crataegus

The indicators of inflorescences of 3 species and 1 variety of section Crataegus hawthorns in the Mari El Republic are studied. The C. rhipidophylla plants have the largest inflorescences and flowers, C. laevigata ‘Plena’ plants have the largest number of flowers in inflorescences. In 2017, the studied plants revealed inflorescences of smaller size and with fewer flowers compared to 2016. C. monogyna plants are characterized by have the longest flowering period.