Lobelia
Family: Campanulaceae
Subfamily: Lobelioideae

A popular flowering plant comprising 360–400 species, with a sub-cosmopolitan distribution primarily in tropical to warm temperate regions of the world, a few species extending into cooler temperate regions. English names include Lobelia, Asthma Weed, Indian Tobacco, Pukeweed, and Vomitwort.

Lobelia species are used as food plants by the larvae of some Lepidoptera species including the Setaceous Hebrew Character.

Lobelia erinus is a very popular ornamental plant in gardens, grown for its long flowering period, from mid spring to early autumn. Edging Lobelia, Garden Lobelia or Trailing Lobelia) is a species of Lobelia native to southern Africa, from Malawi and Namibia south to South Africa.[1]

It is a prostrate or scrambling herbaceous perennial plant growing to 8–15 cm tall. The basal leaves are oval, 10 mm long and 4-8 mm broad, with a toothed margin; leaves higher on the stems are slender and sometimes untoothed. The flowers are blue to violet in wild plants,Edging Lobelia, Garden Lobelia or Trailing Lobelia) is a species of Lobelia native to southern Africa, from Malawi and Namibia south to South Africa.

It is a prostrate or scrambling herbaceous perennial plant growing to 8–15 cm tall. The basal leaves are oval, 10 mm long and 4-8 mm broad, with a toothed margin; leaves higher on the stems are slender and sometimes untoothed. The flowers are blue to violet in wild plants. It is perennial in subtropical climates, but often grown as an annual plant in colder areas. Numerous cultivars have been selected for garden use, with a wide range of flower colours, including white, pink, red, pale to dark blue, and purple. Some of the better known cultivars are ‘Blue Moon’, ‘Cascade’, ‘Gracilis’ and ‘Rosamund’.

The genus is named after the Belgian botanist Matthias de Lobel (1538–1616).

An active ingredient in the lobelia plant, lobeline, is similar to nicotine in its effect on the body. Like nicotine, it stimulates nerves in the central nervous system. For this reason, lobeline was once used as a nicotine substitute in many anti-smoking products and preparations designed to break the smoking habit. In 1993, the U.S. Food and Drug Administration (FDA) prohibited the sale of lobeline-containing smoking products. The FDA reported that such products lacked effectiveness in helping people quit or reduce smoking.

It is important to note that lobelia is a potentially toxic herb. Lobelia can be safely used in very small doses (particularly homeopathic doses), but moderate-to-large doses can cause serious adverse effects ranging from dry mouth and nausea to convulsions and even coma (see Precautions). Under the guidance of a qualified health care provider, however, lobelia, in combination with other herbs that affect the respiratory system, is considered relatively safe. Additional information on it’s medical uses: http://www.umm.edu/altmed/articles/lobelia-000264.htm