Biomorphological characteristics of Lavatera thuringiaca L. and Sida hermaphrodita Rusby introduced into the Forest-Steppe of Ukraine

The results of long-term investigations of biomorphological characteristics of introduced perennial forage plants of Malvaceae family – Lavatera thuringiaca L. and Sida hermaphrodita Rusby in the Forest-Steppe of Ukraine are presented. The data on growth, development, leaf plate area and pure productivity of photosynthesis of perennial cultures in the process of ontogeny in the first and subsequent years of growing are given.