close up of yellow flowers of a mahonia with dark bokeh, berberis aquifolium or gewöhnliche mahonie

close yellow flowers mahonia dark bokeh berberis aquifolium or gewöhnliche mahonie flower bloom shrub evergreen oregon grape barberry spring plant blossom garden nature green botany leaf blossoming cluster flora outdoors health botanical springtime bud spiny saturated growth seasonal medicine thorn thorny twig wilderness hedge petals vitamin branch season blooming