blossoms of a cup plant silphium perfoliatum

silphium perfoliatum flower plant yellow garden summer nature blossom bee herb leaf honey meadow sunflower cultivated agriculture petal insect botany biology sunlight horticulture sun wildflower bouquet pollen beauty flowering gardening prairie closeup animal bright outdoors environment season climate development discovery growth progress head chamomile fragility freshness aster bud bumblebee flowerbed inflorescence blossoms cup flowers green leaves blossom field bee