Rose root, Rhodiola rosea, used in herbal medicine. Close up of flower heads, selective focus.

Rose root, Rhodiola rosea, used in herbal medicine. Close up of single flower head, selective focus.

Rose root, Rhodiola rosea, used in herbal medicine. Close up of flower heads, selective focus.

Rose root, Rhodiola rosea, used in herbal medicine. Close up of single flower head, selective focus.

Rose root, Rhodiola rosea, used in herbal medicine. Close up of single flower head, selective focus.

Rose root, Rhodiola rosea, used in herbal medicine. Close up of flower heads, selective focus.

Heart's ease, Viola tricolor. Close up.

Apple, Malus domestica 'Fiesta' blossoms on twigs.

Buddleja, Buddleja davidii, growing onm urban brick wall in London.

Jostaberry, Ribes x nidigrolaria , growing on the plant.

Jostaberry, Ribes x nidigrolaria , growing on the plant.

Raspberry, Rubus idaeus 'Glen rosa', growing outdoor on the bush against wire support.