Valerianella chenopodifolia (Pursh) DC.
Family: Caprifoliaceae
goosefoot corn-salad, Great Lakes corn-salad
[Fedia chenopodifolia Pursh]
Valerianella chenopodifolia image
from USDA Plants website  
Etymology: Valerianella: diminutive of Valeriana (a medieval Latin name either referring to the Roman emperor or to the word valere, "to be healthy and strong" from its use as a folk medicine in the treatment of nervousness and hysteria)
Plants: perennial forb
Conservation Status: Native