Perennials
Perennials, plants that often grow up anew from dormant rootstocks each year, are the single most floriferous types of plants in the garden. Chrysanthemums, Lilies, Dahlias, Euryops, and a hundred others all arrive in the nursery during their blooming periods, allowing gardeners to create instant showy effects that can come back year after year.
Dahlia
Dwarf Coreopsis
Helianthus
Lily of the Nile
Shrub Daisy
Butterfly Iris
Grecian Pattern Plant
Iris
Cast Iron Plant
Myer's Fern
Asparagus Fern
Canna
Midknight Blue Agapanthus
Gold Coin Daisy
Ground Morning Glory
Bloodstone Thrift
Snowflake Candytuft
Dwarf Blanket Flower
Santa Claus Fuchsia
Sea Lavender
Purple Coneflower
Daylily
Angelita Daisy
Red Leaved Banana
Hosta

Lavender
Russian Sage
Sarah Bernhardt Double Peony
Giant Lilyturf
Fortnight Lily
Mondo Grass
Ozark Sundrops
Jacob Cline Bee Balm
Professor Kippenburg Dwarf Aster
Graham's Sage
African Daisy
Lantana
Goldsturm Black-eyed Susan
Bronze Carpet Stonecrop
Tri-color Society Garlic
Peter Pan Agapanthus
Canna Lily
Penstemon
Geranium

Gazania
Mexican Red Bird of Paradise
Coreopsis
Shasta Daisy
Temari Verbena

Go to Yahoo, and type Perennials in the search box. The response will be robust.