Greek Valerian; Jacob's Ladder
Polemonium reptans /Phlox Family
This plant was growing among Blue Phlox on the Haw Ridge Trail in Oak Ridge and I nearly missed it! There is another similar plant, also called "Jacob's Ladder" (P. van-bruntiae), it has protruding stamens with reddish anthers. This is why I always add the scientific names!
Where seen: Haw Ridge Greenway, Great Smoky Mountains NP, Warriors' Path SP, Ijams Nature Center