Large-flowered agoseris is found on thin-soiled upland prairies and rocky balds. It has a large rosette of cut-leaves and dandelion-type flowers that close by mid-morning. The flowers become a big white ball of fluff when in seed. As with our lawn dandelion, it will re-flower after it is cut. 1-2 ft.
Eriophyllum lanatum var. leucophyllum (Oregon Sunshine)
Provides a very long-lived showing of golden daisies to the mid-spring and summer landscape. The wooly leaves form a dense, nearly evergreen mat 1-2' tall. It is excellent as a border perennial or a groundcover and is one of the matrix species in the Willamette Valley prairies. Nectar species for Fenders Blue Butterfly and Field Cresent.
With dark green finely dissected leaves, this biscuitroot produces new growth in the fall and blooms in May with a seemingly never-ending supply of brilliant gold-yellow flowers. It produces an outstandingly beautiful show. It is drought resistant.
This low-growing pea has striking yellow flowers with white tips and is an integral part of our wet prairies. It is found mostly in vernal wet areas with other perennials such as Allium amplectens and Triteleia hyacinthina, and Dodecatheon pulchellum and annuals such as Plagiobothrys figuratus, and Mimulus guttatus.
Flowers are large and beautiful, fringed, bright yellow, and often with a magenta center. The foliage is aromatic (sweet), it flowers for an extended period (up to 2 mo.) but flowers close by mid-morning, 4-5 ft tall (in garden or without competition). The seed is a small sunflower seed that attracts many birds.
Potentilla gracilis (Slender or Graceful Cinquefoil)
Just as the common name says, this plant produces a graceful 1' mound of lacy fretted palmate foliage with sunshine yellow flowers. In western Oregon, it is a key species in both our wet and dry prairies and its long bloom-time in June attracts numerous native pollinators.
This native buttercup blooms April through mid-May and is an early shining star of our prairies. Very persistent due to self-sowing. It also makes a nice addition to native gardens giving our native bees important resources early in the season.
Curvpod yellowcress is found throughout the west in a variety of wet habitats. In our prairie habitats, it is found with other annuals in areas with low cover of other vegetation such as vernal pools. In mild winters, it can act as a biennial.
Very showy, large yellow flowers (sunflower family), large expressive leaves (aka "mule's ears"). The seeds are large and attract goldfinches at the height of summer. Nectar species for Field Cresent butterflies.