THE INITIAL STAGES OF ONTOGENESIS IN HYBRIDOGENEOUS SEEDLINGS OF ASTILBE BUCH.-HAM. EX D. DON IN THE FOREST-STEPPE CONDITIONS OF UKRAINE
This paper shows results of the study on initial stages of ontogenetic morphogenesis in astilbe hybridogeneous seedlings, namely during progenerative period. It is found that astilbe plants, unlike most perennials, are characterized by rapid pace of development. Four age states were determined in the progenerative period. The practical recommendations for seed propagation of astilbe are given.