Name: Helleborus dumentorum W.K.
Croatian name: Sitnocvjetni kukurijek
English name: hellebore
This perennial plant appears in late Winter and early Spring (February to March) in woodlands. The genus is native to Europe, but the greatest concentration of species occurs in the Balkans.
It is a perennial plant that grows from rhizome. Flowers have five petals and are green in colour. They have many stamens and pistils. Leaves are basal, serrate, pedate with 9-12 segments.
Fruit is follicle.
Image: Tim Murphy (taken in Croatia).
For more on helleborus see HERE