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What Is Lobelia Inflata?

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  • Written By: Jillian O Keeffe
  • Edited By: Shereen Skola
  • Last Modified Date: 25 June 2014
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Lobelia inflata is a plant that is native to North America and historically was used in Native American medicine. It is a herb that has a straight stem, pale leaves and blue flowers. Potentially poisonous, the leaves and seeds form part of herbal remedies and homeopathic treatments for conditions like asthma.

Another name for Lobelia inflata is Indian Tobacco, as the leaves taste like chewing tobacco. Pukeweed is another common term for the plant, as it found a use in the 1800s as an agent to stimulate vomiting. Other names for Lobelia inflata include gagroot, bladder pod or asthma weed.

The plant prefers to grow in sunlight, and likes locations like meadows, road verges and open woods. It typically grows for one year before dying off, although the species can also last for two years. In appearance, the herb is about 3 feet (about 1 m) in height, and has hairs on the lower portion of the stem; the stalks only grow off this portion. Inside the stem is a milky sap, and the leaves are pale green in color, or have a yellow tint. In the summer, the herb produces flowers that are blue with a yellow interior, and the spherical fruits that it produces contain the seeds that, along with the leaves, form the herbal remedy made from the plant.

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Appropriate soil for Lobelia inflata is acid, rich in nutrients and moist. A comfortable temperature range for the plant is roughly between 44° to 66° Fahrenheit (7° to 19° Celsius.) Although it likes lots of sun, it can also survive in partial sunlight.

Widespread across the North American continent, Lobelia inflata has a range from the eastern seaboard over as far as Kansas. Native Americans used the plant to treat asthma patients, who used to smoke it in the same way as tobacco is commonly smoked. Lobelia inflata does contain a chemical that has a noticeable effect on the body called lobeline.

At one point, Lobelia inflata found a use as a tobacco replacement therapy, but this is banned in countries such as the United States. Herbal and homeopathic remedies containing Lobelia inflata are based on the historical uses of the plant, which include problems with the respiratory tract like asthma or bronchitis. Although minuscule doses like those in homeopathic remedies may be safe to ingest, the plant is poisonous, and can prompt vomiting, seizures and may even be lethal.

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