PERENNIALS FOR DIFFERENT PURPOSES : Page 628
Day Lily Maidenhair ThalictrumThermopsis carolinianaFalse Lupine
i. Perennials for autumn—purple, lavender, or blue flowers:
Aconitum (in variety) Caryopteris incana (treat as a perennial)
Monkshood Blue Spirea
Aster—Hardy varieties Ceratostigma plumbaginoides
Climax—Blue Leadwort
Edward VII—Blue Eupatorium coelestinurr,
Ed Beckett—Blue Mist Flower
Feltham's Blue Salvia azurea grandiflora