Yarrow Oil (Milfoil) (aromatherapy)

Milfoil Oil is a dark blue or greenish blue to dark olive colored liquid with a sharp, somewhat camphoraceous odor, drying out in a sweeter, faint and pleasant note. The overall odor may recall the odors of cedarleaf and tansy, Texas cedarwood (faintly) and valerian (but without any acid notes). The bluish color is due to the presence of azulenes (see chamomile oil),
Arctander, Steffen . Perfume and Flavor Materials of Natural Origin (p. 485). 

achillea millefolium