Host Vascular Plants for Pests in the Hydrographical Basin of the Otăsău River, Romania

This study was carried out to investigate vascular host plant distribution in the hydrographical basin of the Otăsău River (Vâlcea County, in the Central Southern part of Romania). In order to determine the existing species in this area, fresh and dry material were collected. Specie identification was made based on a repetitive observation of the plants. A taxonomical aid was used to identify the species and classify them into different categories. In this research 368 taxa were investigated and registered as host vascular plants for pests from the studied area. The geoelement analysis shows that Eurasian, European, Central European, Cosmopolite and Circumpolar elements are predominant. Concerning the bioform spectrum the most representative components of the herbaceous layer are hemicryptophytes with 127 taxa. The study reveals that the studied area presents a high floristic diversity of the vascular plants (about 10% of the Romanian flora).