Rumex longifolius DC.
Family: Polygonaceae
door-yard dock, long-leaved dock, yard dock
[Rumex domesticus Hartm.]
Rumex longifolius image
University of Wisconsin - Madison (WIS-VP)  
Etymology: Rumex: the ancient Latin name for the docks or sorrels
Plants: erect, perennial, up to 5' tall, coarse forb
Leaves: lower narrowly oblong, widest near the middle
Flowers: 6-parted, mature flower stalks jointed near the base
Conservation Status: Introduced - locally established