Everyone has seen this plant before without wondering what kind of plant it actually is. It grows between the tiles in cities and you often find it on vacant lots. The Canadian fleabane is a plant that can grow to a height of about one and a half meters. The flowers can be white, red or yellow, but they are usually white with a yellow center. It prefers to grow in sandy soil in a sheltered spot. It does well in poor soil but can also grow in soil with lots of nutrients. In the eyes of most people, the plant has no ornamental value. It is classified as a weed but unfortunately for passionate gardeners the plant cannot be controlled with herbicides. The plant has important medicinal properties that are used in phytotherapy. This includes: the diuretic effect, healing effect on hemorrhoids and the effect against osteoarthritis and arthritis. NB! This article is written from the personal view of the author and may contain information that is not scientifically substantiated and/or in line with the general view.
Botanical drawing Canadian fleabane / Source: Johann Georg Sturm (Painter: Jacob Sturm), Wikimedia Commons (Public domain)
- History of use
- Active substances
- Dose and safety conyza
Originally this plant only occurs in North America, but because it was brought by travelers in the 17th century, the plant is present in Europe. It has a strong dispersal power because the fruit fluff is light and is carried far by the wind. A single plant can produce 25,000 to 250,000 lint seeds in a year. The Canadian fleabane is now growing extensively throughout Europe and Asia. The fact that this plant can grow anywhere in nutrient-poor soil contributes to its wide spread, as does the fact that it appears to be immune to all existing herbicides. And why would you want to exterminate him anyway? It is an edible plant; the leaves are small but can be consumed as a vegetable or herb.
The Latin name of Canada fleabane is Conyza canadensis . Canadensis obviously comes from the fact that this medicinal plant is originally found in Canada. In Dutch this plant is called Canadian fleabane and has no other name. The plant does have an alternative Latin name: Erigeron canadensis .
History of use
The Navajo Indians used the herb of the Canadian fleabane to treat pimples. It was also used as a medicine against snake venom. The Chippewa Indians used it for menstrual pain. In 1665 it was taken to Europe by European travelers. At that time, people were very interested in exotic plants and their possible ornamental and medicinal value
Canadian fleabane / Source: Michael Becker, Wikimedia Commons (CC BY-SA-3.0)
aspects. Canadian fleabane soon gained fame in Europe because a tea made from this herb works well for menstrual pain, uterine bleeding and diarrhea. In Germany, this herb is still used today in herb butter, herb salt and herb mixtures. The herb has a slightly bitter taste and is harvested from April to July.
In phytotherapy, there is not enough evidence that this medicinal plant would help with uterine bleeding.
The herb from this plant that grows above ground is used. It contains the following active substances: gallotannins, o-benzyl-benzoic acid, essential oil such as d-limonene and trans-a-bergamotene, terpineol and its derivatives, citronellal, p-cymol, linalool, the flavonoids scutellaroside and glucoronide of scutellarein, the phytosterols stigmasterol, stigmastadienol, spinasterol and sitosterol, polyins, matricaria ester and dehydromatricaria ester.
Canadian fleabane is not only diuretic but also diuretic. In addition, it has an anti-inflammatory effect. Uric acid is the main cause of the occurrence of rheumatic diseases, which in fact also includes lumbago or lower back pain and gout. Due to these medicinal effects, Canadian fleabane is used in phytotherapy for the following
Canadian fleabane / Source: H. Zell, Wikimedia Commons (CC BY-SA-3.0)
- Albuminuria or protein in the urine,
- To prevent cystitis or bladder infection.
Conyza canadensis has a proven blood pressure lowering effect.
Dose and safety conyza
Those who stick to the prescribed dose have no chance of side effects; at least, these have never been described before. There are a few ways to benefit from the healing powers of Canada fleabane:
- 30 drops of mother tincture three times a day.
- Two teaspoons per day of a liquid extract.
- In the morning, three cups of a decoction of 150 grams of the herb per liter of water. Make sure the water with the herb boils for five minutes.