Grass Poly, Hyssop Loosestrife
Lythrum hyssopifolium
Synonyms: Lythrum adsurgens, Lythrum hyssopifolia

Stem leaves and axillary flowers of hyssop loosestrife as seen in a vernal pool along the Company Road which parallels the west bank of the Klickitat River between Wahkiacus and Leidl Park, Klickitat County, Washington........July 21, 2011.
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- 
Additional close-up photos of the stem leaves and axillary flowers of hyssop loosestrife as seen in a vernal pool along the Company Road which parallels the west bank of the Klickitat River between Wahkiacus and Leidl Park, Klickitat County, Washington..........July 21, 2011.
- 
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- 
Close-ups of the stem leaves and axillary flowers of hyssop loosestrife as seen on the sandy shoreline of the west bank of the Deschutes River about one-half mile upstream of the Columbia River........July 27, 2011.
Paul Slichter