Sedum, Red Admiral butterfly Vanessa atalanta, feeding on a pink flowerhead in garden border.

Sedum, Red Admiral butterfly Vanessa atalanta, feeding on a pink flowerhead in garden border.

Ice plant 'Meteor', Sedum spectabile 'Meteor', Mass of purple coloured flowers growing outdoor.

Stonecrop, Sedum 'Herbstfreude', Mass of tiny pink flowers growing outdoor.

Angleina stonecrop, Sedum rupestre 'Angelina', Meadow brown butterfly on the bright yellow coloured flower.-

Ice plant, Sedum telephium subsp. maximum 'Gooseberry Fool', Close view of several flowerheads in bud.

Ice plant, Sedum telephium subsp. maximum 'Gooseberry Fool', Close view of several flowerheads in bud.

Stonecrop, white, Sedum album.

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.

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