Zvaniche or Hypericum (Hypericum) is a genus of herbaceous plants Clusiaceae family (Clusiaceae). Its most famous representative is St. John's wort (Hypericum perforatum). The genus has about 300 species growing mainly in the Mediterranean and Balkan countries. Bulgaria offers about 22 species, including endemic Balkan degenova Hypericum (H. degeni), sennikovidna Hypericum (H. umbellatum) and Roumelian Hypericum (H. rumeliacum). Grow throughout the country, in grassy places, thickets, clearings and fields.