illyrian thistle, arribes del duero natural park

illyrian thistle onopordum illyricum flower flora flowering plant head botanic bloom blossom petal stamen botany freshness inflorescence pollen springtime vegetable fragile fragility delicate wildlife nature biodiversity biosphere biology ecology ecotourism wild environment beauty reserve natural parkland conservation area park protected arribes duero salamanca castile leon spain europe del spa sac castilla leapound asup3