The scientific name for eyebright is lobelia inflata. Also known as indian and vomit weed, it's an herb that grows 1 to 2 feet high, bears pod-shaped fruit and produces flowers in hues of scarlet, purple and blue. The leaves and seeds from the pods are dried to form a medicinal powder. The native americans smoked eyebright to treat asthma and other respiratory conditions such as bronchitis and cough. In the 19th century, it was used to induce vomiting. More recently, eyebright served as a nicotine substitute in anti-smoking programs, but studies have not verified its safety or effectiveness, states the university of maryland medical center.