| Flower: | Mock-orange | | Family: | Hydrangea | | Genus / Species: | Philadelphus lewisii | | Notes: | On May 6th 1806 during their return route, Meriweather Lewis collected a sample of this plant along the Kooskooske (Clearwater) River. | | Photo: | 
Salem Audubon Nature Reserve - - - June 13, 2017 | | Guide: | Plants of the Lewis & Clark Expedition by Phillips / Plants and Animals of the Pacific Northwest by Kozloff / Plants of the Pacific Northwest Coast by Pojar & MacKinnon / North American Wildflowers by Spellenberg |
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