Flora of Hrastovička Gora (Petrinja city area)

Hrastovička gora is the northernmost part of the hilly area of Zrinska Gora in Banovina (Sisak-Moslavina County). No systematic research on flora of this region was ever done. An inventory of the flora was conducted in 2020. In all, 433 plant taxa were found, belonging to 90 plant families. The most frequent families are Fabaceae (36 taxa), Asteraceae (35 taxa), Lamiaceae (31 taxa) and Poaceae (31 taxa). Analyses of chorological types, life forms and origin were made. The most common chorological type is Eurasian (40.1%), followed by European (14.8%) and Mediterranean (11.6%). Most taxa (80.1%) are of indigenous origin, but as many as 19 invasive plant species were recorded. Almost two-thirds of all taxa are either hemicryptophytes (44.2%) or geophytes (20.4%). Only one endemic species was found, namely Helleborus atrorubens Waldst. et Kit. A large number of endangered and strictly protected plant taxa were also recorded with 17 taxa being threatened and 14 taxa being strictly protected. Forests and thermophilous grasslands have been shown to be important habitats for endangered and strictly protected species and it is therefore crucial to keep a management regime that will conserve their favourable status, while preserving stable ecological conditions