Achilles keeps away the deer

I was reading this article at SFGate about plants that deer don't like to eat. Now I know Chatty has had some issues with the deer up on the mountain. So I found it interesting when I read this in one of the paragraphs:

One of the toughest perennials that tolerates poor, dry soil is the genus Achillea, named for Achilles, who relied on its medicinal properties to treat his wounded soldiers. Sadly, it failed to cure the fatal wound to his heel. With its fernlike foliage and large, flat flower heads, yarrow adds punch to any bouquet, but as with all cut flowers, strip it of its lower foliage before arranging it in water.