This is the essential oil a tall perrenial grass. Good for scenting soaps and rooms and repelling bugs. The eo is an anti-spasmodic and anti-inflammatory and is used for pelvic pain and arthritis. It is anti-viral and can be used as an inhalant when one has a cold, flu or minor respiratory infection. Does speed the heart.

A 2010 study found that Red Thyme, Lemon Eucalyptus, Citronella, Pennyroyal, Caraway Seed and Cloverleaf essential oils were effective against red spider mites that had become resistant to chemical pesticides.
http://www.ncbi.nlm.nih.gov/pubmed/20857739