The lobelia genus has numerous species, both annual and evergreen, originating in Asia, Africa and Europe. Lobelia erinus is an annual African variety. It has a prostrate bearing, which makes it suitable as a plant for flower beds or in hanging baskets. It has thin flexible, elastic, green stems and small leaflets; reaches 10-15 cm in height. From April to the early cold it produces a cascade of small tubular flowers, of an intense purple color; there are varieties with blue, blue, white flowers or in shades of pink. Easy to grow, it is widespread in European gardens, where it has been cultivated for many decades.
There lobelia it is a much loved plant, both in its annual and perennial species.
There lobelia erinus, widespread in all gardens, is the first that comes to mind for many for being able to give us the most beautiful and intense blue in the plant environment, accompanied by a very long and uninterrupted flowering.
However, there are also numerous species and cultivars with red, pink, lilac and orange flower heads which, widespread abroad and in particular in England, should find more admirers also in our country.
The genus, in fact, is very numerous. It includes from 200 to 365 species (depending on the authors) from the most varied areas of the world, more particularly from the temperate and cool areas of Asia, Australia and the Americas. Some also come from tropical areas.
Endemic to our continent are only lobelia dortmanna and Lobelia lurens.