Petrofitny element in the flora of Penza region (on an example two tract "Big and Small valley")

Floral and Phytotsenotichesky characteristic stony-sandy steppes of Mokshansky district of the Penza region is given in the article. Many rare species are involved in flora including the semi-desert shrub: Krascheninnikovia ceratoides. Astragalus asper noted in the Penza region only in these two tracts. Real steppes are developed mainly on the steep slopes of the southern exposure, and meadow steppes - the gentle slope of southern, western and eastern exposures.