First records of a potentially new plant community from the ruderal vegetation in the Black Sea Coast, Bulgaria

The paper presents the first data of an unreported plant community dominated by Hordeum leporinum Link and Bituminaria bituminosa (L.) Stirt. (class Stellarietea mediae R. Tx., Lohmeyer et Preising in R.Tx. 1950). It is currently established four localities region Black Sea coast, between town Ravda Nessebar, Bulgaria. Among characteristic features are: (i) it occupies places with active human presence near beach; (ii) preferences for shallow san-dy or rocky soils; (iii) as a dominant, diagnostic constant species community. Other association are Anchusa officinalis L., Malva sylves-tris Sonchus arvensis L. Avena fatua (iv) annual perennial have equal participa-tion community; (v) increased class Artemisietea vulgaris al. ex von Rochow 1951. Phytogeographically, composition has strong Mediterranean influence. In close proximity to its reléves there always communities xerophytic shrubs low trees (in many cases alien species, such Amorpha fruticosa Ziziphus jujuba Mill. Robinia pseudoacacia L.) that participate without forming full second layer (their cover abundance less than 30%).