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White Cinquefoil, P. Arguta, blooms in late June or July among mixed arid forests of pine and firs along the Chewuch River near the Pasayten Wilderness in the North Cascades.  The Chewuch drains from the North Cascade Mountains toward the Methow River at the village of Winthrop, where the two merge to drain throught the Methow Valley to the mighty Columbia at Lake Pateros.
110628_Winthrop_5265White Cinquefoil, Chewuch River Drainage.jpg