Stachys tenuifolia var. tenuifolia  
Family: Lamiaceae
narrow-leaved hedge-nettle, smooth hedge-nettle
[Stachys glabra Riddell, Stachys hispida Pursh, Stachys palustris var. hispida L., Stachys tenuifolia var. hispida Willd., Stachys tenuifolia var. platyphylla Willd.]
Stachys tenuifolia var. tenuifolia image
Merel R. Black  
Etymology: Stachys: from the Greek stachus for "ear of grain" or "a spike," in reference to the spike-like form of the flowers
Plants: erect, perennial, to 40" tall, aromatic forb, not hairy; stems square, usually unbranched
Leaves: opposite, thin, oblong with a pointed tip, toothed, stalked
Flowers: pink, 5-parted, 3/8"-2/3" long, flower drawing; inflorescence separated whorls of stalkless flowers from the upper leaf axils; blooms June-Aug.
Fruits: 1-seeded nutlet
Habitat: shade; moist
Conservation Status: Native
Stachys tenuifolia var. tenuifolia image
Robert Bierman  
Stachys tenuifolia var. tenuifolia image
Robert Bierman  
Stachys tenuifolia var. tenuifolia image
Theodore S. Cochrane  
Stachys tenuifolia var. tenuifolia image