black poplar against a sky with clear clouds

black poplar sky clear clouds altocumulus cloud middle altitude formation floccus wide extension white grey own shadow water ice crystals atmosphere troposphere perlucidus stratiformis vapor condensation ascending daylight sunlight morning atmospheric phenomenon gray blue umbria italy europe springtime outdoor environment fluffy air cloudscape bright light weather nature natural tree populus nigra leaves sihlouette salicaceae deciduous silhouette stands covered