Achillea
Aconitum
Agapanthus
Agastache
Alcea
Alchemilla
Alstroemeria
Anemone
Artemesia
Aster
Astilbe
Astrantia
Baptisia
Boltonia
Catanache
Centaurea
Centranthus
Cheiranthus
Chrysanthemum
Campanula
Coreopsis
Crocosmia
Delphinium
Dianthus
Digitalis
Doronicum
Echinacea
Echinops
Erigeron
Eryngium
Eupatorium
Euphorbia
Gaillardia
Gaura
Geum
Gypsophila
Helenium
Helianthus
Heliopsis
Helleborus
Heuchera
Hosta
Iris
Knautia
Lavendula
Liatris
Lilium
Limonium
Lupinus
Malva
Matricaria
Monarda
Nepeta
Papaver
Patrinia
Penstemon
Peony
Perovskia
Platycodon
Phlox paniculata
Physostegia
Pyrethnum
Rudbeckia
Ruta
Salvia
Scabiosa
Solidago
Stokesia
Thalictrum
Trollius
Zanteaeschia

All of these perennials make great cut flowers, but do not forget to experiement with other flowers from your garden!