Achillea genus --- Aster Subfamily 2.1
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common yarrow (Achillea millefolium) -- in August -- Arthur's Rock Trail, Lory State Park white & cream
common yarrow (Achillea millefolium) -- in April -- Arapaho Bend Natural Area, Fort Collins, CO FC-AB
common yarrow (Achillea millefolium) -- in September -- Parvin Lake State Wildlife Area, CO
