Sweet Flag Dried Cut Root Loose Herbal Tea – Acorus Calamus – Superior Quality Herbs&Roots Calamus (Acorus Calamus) is a tall perennial plant that originated in India, but today we find it in many parts of the world – across Europe and Asia and Australia. Characteristic of Kalamos is the pleasant aroma (reminiscent of tangerine) of its leaves and root. To prepare the decoction, add 3 spoons of the herb to 1 liter of water and boil until 1/3 is left. No larger quantity can be kept – it must be brewed every day – as its smell becomes unpleasant. Disclaimer: These statements and products have not been evaluated by the FDA. They are not intended to diagnose, treat, cure, or prevent any disease or condition. If you have a health concern or condition, consult your doctor. Always consult a medical doctor before modifying your diet or using any new product.