The lobelia is a native plant of North America that reaches up to 1m height. The leaves are oval and the flowers are blue, white, blue or purple, depending on their genre (about 200).The lobelia is used as a powerful anticonvulsant for disorders of the respiratory and muscular system. Also, it is used as an expectorant and may cause vomiting. The blue lobelia is known in homeopathy for diarrhea.