Menzies' Larkspur, Delphinium menziesii

These pretty blue flowers were found growing along Fly Creek in SW Washington.

Tall Pepper-grass, Lepidium virginicum

This non-native annual is growing on  a rock outcrop at Lucia Falls County Park in SW Washington.

Sharp-Toothed Cinquefoil, Potentilla arguta

Yet another resident of Lucia Falls County Park in SW Washington, this thornless member of the Rose family is not commonly found West of the Cascades.  I found quite a few growing in a sunny, rocky area with very little soil.

Enchanter's Nightshade, Circaea alpina

I have no idea why, but this plant decided to show up on our property in SW Washington 2 years ago and now there are hundreds.  It is a small understory plant that can form a dense community on the forest floor.
 

Foamflower, Tiarella trifoliata

This native perennial is abundant along the banks of the creek next to our house; I look forward to seeing them come up each Spring and then flowering in late May.

Smooth Alumroot, Heuchera glabra

Another resident of Lucia Falls County Park in SW Washington, this plant was used by native people on cuts to stop bleeding and promote healing.

Cow-Parsnip, Heracleum lanatum

This large plant was found growing near the bank of the East Fork of the Lewis River in Lucia Falls County Park in SW Washington.  It is probably best to not touch this plant as it can cause skin damage, especially to light-sensitive individuals.

Flower closeup: