Lavendula officinalis syn. L. angustifolia 

The Romans enjoyed the fragrance of the blossoms floating in their community bathtubs (similar to modern day Jacuzzis). These pools were called lavatios, a noun form of the infinitive lavare, which means to wash. In Classical Latin, the term was lavatio, but in Medieval Latin it became the lavendula. The English word lavender comes from the Medieval Latin word lavendula.

In the Middle Ages, it was used alone or in combination with other herbs to treat insomnia, anxiety states, migraine headaches, and depression. The fragrance is relaxing, so the dry blossoms were stuffed in pillows given to agitated patients to induce sedation. The oil is strongly antiseptic and used to heal wounds. There are a variety of products including perfume, soap, sachets, and sleeping pillows that use the dry blossoms and oils in some form.