Asthma weed treats the bronchi, the two main branches that enter the lungs, and makes breathing easier. It is known to treat asthma, hay fever, and upper respiratory tract catarrh, a disease of the mucous membranes.
Sources in the Diet
-  – The New Encyclopedia of Vitamins, Minerals, Supplements, and Herbs
-  – http://www.nytimes.com/1865/03/03/news/chronic-catarrh-its-symptoms-causes-effects-few-practical-remarks-dr-lighthill.html