This is the official mugwort native to temperate Europe, Asia, and north Africa often referenced in witches spells and potions.  It is a very strong cooling bitter that I like to use in apple cider vinegar as an anti-inflammatory liniment for poison oak or other irritated rashes. 

In the garden, either give this plant plenty of space to make a thick stand of dense, spreading six-foot-tall stems, or plant it in a pot.

Mugwort belongs to the genus Artemisia, named after the Greek goddess Artemis - the goddess of the moon, the hunt, wild animals, and childbirth.  At the same time that mugwort is a cooling, anti-inflammatory, and bitter herb, it is also used to invoke Artemis and all she represents.  While mystical herbalists know that mugwort brings vivid dreams to those who drink the tea or keep a bundle under their pillow, modern scientists have also confirmed that it interrupts deep sleep in favor of REM sleep in which dreams are made.