Rumex salicifolius var. denticulatus   toothed willow dock
           (Alt: Rumex californicus )
  
Polygonaceae
uncertain                      herbaceous           
Distribution: Greenbelt
Bloom: Aug - Sep

UW Burke Herbarium Link: Rumex salicifolius var. denticulatus
USDA Plants Link: Rumex salicifolius var. denticulatus   (RUSAD)