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Allegheny monkey-flower, square-stemmed monkey-flower
Distribution: Occurring on both sides of the Cascades crest along the Columbia and Snake rivers in Washington; Washington to California, east to Idaho and Montana, also in central and eastern North America where native.
Habitat: Riparian corridors in open sites, tolerant of episodic or extensive inundation.
Origin: Introduced from central and eastern North America
Flowers: July-September
Growth Duration: Perennial
– Allegheny monkey-flower, square-stemmed monkeyflower