When selecting ornamental plants to attract and support pollinators, consider choosing native species that are well-adapted to your local environment and climate. In general, plants with open, daisy-like flowers, shallow blooms, and bright colors tend to be more attractive to pollinators. Here are some ornamental plants known to perform well for pollinators:

1. Lavender (Lavandula): Lavender is a perennial shrub that produces fragrant purple flowers during the summer. It is a favorite among bees and other pollinators seeking nectar.

2. Coneflower (Echinacea): Coneflowers are native North American plants with colorful daisy-like blossoms. They attract various pollinators, including bees, butterflies, and hummingbirds.

3. Sunflowers (Helianthus): Sunflowers are another pollinator favorite, particularly beneficial for bees and butterflies. They offer abundant pollen and nectar sources throughout their bloom period.

4. Monarda (Monarda): Monarda, also known as Bee Balm or Bergamot, is a genus of flowering plants with aromatic leaves and vibrant red, pink, or purple blooms. It's a magnet for pollinators, especially bees and hummingbirds.

5. Cosmos (Cosmos): Cosmos are easy-to-grow annual flowers that come in various colors. Their open blooms provide nectar and pollen to a wide range of pollinators.

6. Asters (Aster): Asters are late-season bloomers that provide valuable resources for pollinators when many other flowers have faded. Their daisy-like flowers are attractive to various pollinators, including bees and butterflies.

7. Goldenrods (Solidago): Goldenrods are known for their showy yellow plumes during the fall. Although they've been unfairly associated with allergies, goldenrods are highly beneficial to pollinators, particularly butterflies.

8. Penstemon (Penstemon): Penstemon, or Beardtongue, offers tubular-shaped flowers in a variety of colors, attracting hummingbirds, bees, and other long-tongued pollinators.

9. Phlox (Phlox): Phlox plants boast clusters of fragrant flowers in shades of pink, purple, white, and red. They are attractive to butterflies, moths, and certain bee species.

10. Zinnia (Zinnia): Zinnias are popular annuals that produce showy, multi-colored flowers from summer to fall. They are magnets for butterflies and other pollinators.

Remember that diversity is key when creating a pollinator-friendly garden. By combining different species with varying bloom times, you can provide a continuous source of food and shelter for various pollinators throughout the season.