Flowers like the iris, chrysanthemum, lily and delphinium (blue), were certainly known to the ancients but do not feature much in garden scenes.
en.wikipedia.org Asters, ageratum, balsam, begonia, petunia, pansy, phlox, cosmos, zinnia and perennial flowers like salvia, delphinium, larkspur, and dahlia are the main attraction in this garden.
en.wikipedia.org Perennial flowering plants include delphinium, hollyhock, lavender, and roses.
en.wikipedia.org The common name, larkspur, referring to the spur-shaped calyx, is shared with the closely related perennial delphinium.
en.wikipedia.org