close-up of the flower of a persian crown imperial growing in the garden. the calyxes are green and yellow

flower nature outdoor vertical photography people color image fritillaria growth day flowering plant beginnings closeup springtime biology spring bloom yellow green botany garden leaf focus foreground close colour crown ornamental petal science exotic horticultural persian empty freshness inflorescence germany floral beauty absence tropical blossom central europe head season persica close-up imperial growing calyxes are garden