File:Achillea millefolium occidentalis drawing.png

This tree is also known as western yarrow, or Wooly Yarrow. The synonym for the subspecies is Achillea millefolium ssp lanulosa var alpicola or Achillea lanulosa. Lanulosa means "wooly". Illustrations from N.L. Britton & A. Brown (1913): Illustrated Flora of the Northern States and Canada. Date: 1913 A.D. Provided to the USDA Plant Database courtesy of Kentucky Native Plant Society. Scanned by Omnitek Inc.