As a result of research on the distribution and syntaxonomic diversity of phytocenoses of petro- and psammophytic ecological-edaphic variants of steppe vegetation with dominance and subdominance of feather grass on the Donetsk Upland and in the Northern Cis-Azov region, we listed 331 associations of petrophytic steppe, petrophyton and psammophyton, which belong to 99 formations, 10 classes of formations and 3 types. As much as 290 rarity phytosystems have been registered in specially protected natural areas. Among them, 256 plant communities can be recommended for special protection. 91 phytosystems are regionally rare. The most associatively diverse and widespread formations are Stipeta capillatae, Stipeta grafianae, Stipeta lessingianae. The distribution of stenotopic formations Stipeta asperellae, Stipeta borysthenicae and Stipeta graniticolae are confined to specific ecological and phytocenotic conditions. Most of the formations of stenotopic communities are concentrated on the Cis-Azov Upland.

Yu.V. Ibatulina, V.M. Ostapko