flowers on caucasian comfrey close up

asperum asterids beinwell blossom blossoming blue boraginaceae botany bush caucasian caucasium close comfrey comfreynclose curl family field flora floral flower flowers garden green healthy herb herbal inflorescence leaf longterm meadow medicinal medicine natural nature nobody object outdoor petal plant prickly rough selectivefocus shallowdof shrub spring stalk stem summer symphytum upnmacro white wildgrowing