homebanner homebanner homebanner homebanner homebanner homebanner
Conyza canadensis - (L.)Cronquist.
                 
Common Name Canada Fleabane, Canadian horseweed
Family Asteraceae or Compositae
USDA hardiness 6-9
Known Hazards Skin contact with the plant can cause dermatitis in some people[222].
Habitats Light soils on waste and cultivated land, also on walls, avoiding acid soils in Britain[17].
Range N. America. Naturalized in Britain[17].
Edibility Rating  
Other Uses  
Weed Potential Yes
Medicinal Rating  
Care
Fully Hardy Well drained soil Moist Soil Semi-shade Full sun

Summary

Conyza canadensis Canada Fleabane, Canadian horseweed


http://commons.wikimedia.org/wiki/File:Asteroideae_spp_Sturm10.jpg
Conyza canadensis Canada Fleabane, Canadian horseweed
   
Physical Characteristics
 icon of manicon of flower
Conyza canadensis is a ANNUAL growing to 1 m (3ft 3in) by 0.5 m (1ft 8in).
It is hardy to zone (UK) 7. It is in flower from Jun to October, and the seeds ripen from Jul to October. The flowers are monoecious (individual flowers are either male or female, but both sexes can be found on the same plant) and are pollinated by Bees, flies.It is noted for attracting wildlife.
Suitable for: light (sandy) and medium (loamy) soils and prefers well-drained soil. Suitable pH: neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers dry or moist soil and can tolerate drought.

Synonyms
Erigeron canadensis.

Habitats
 Cultivated Beds; East Wall. By. South Wall. By. West Wall. By.
Edible Uses
Edible Parts: Leaves.
Edible Uses: Condiment.

Young leaves and seedlings - cooked[105, 177]. Boiled, cooked in rice or dried for later use[183]. A nutritional analysis of the leaves is available[218]. The source of an essential oil that is used commercially for flavouring sweets, condiments and soft drinks[183]. The fresh leaves contain 0.2 - 0.66% essential oil[218].
Composition
Figures in grams (g) or miligrams (mg) per 100g of food.
Leaves (Dry weight)
  • 0 Calories per 100g
  • Water : 0%
  • Protein: 14.9g; Fat: 1.8g; Carbohydrate: 75.1g; Fibre: 26.1g; Ash: 8.2g;
  • Minerals - Calcium: 1010mg; Phosphorus: 280mg; Iron: 0mg; Magnesium: 0mg; Sodium: 0mg; Potassium: 2610mg; Zinc: 0mg;
  • Vitamins - A: 0mg; Thiamine (B1): 0mg; Riboflavin (B2): 0mg; Niacin: 0mg; B6: 0mg; C: 0mg;
  • Reference: [ ]
  • Notes:
Medicinal Uses


Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.

Astringent;  Diuretic;  Emmenagogue;  Homeopathy;  Hypoglycaemic;  Styptic;  Tonic;  VD;  
Vermifuge.

In traditional North American herbal medicine, Canada fleabane was boiled to make steam for sweat lodges, taken as a snuff to stimulate sneezing during the course of a cold and burned to create a smoke that warded off insects[254]. Nowadays it is valued most for its astringency, being used in the treatment of gastro-intestinal problems such as diarrhoea and dysentery[254]. It is said to be a very effective treatment for bleeding haemorrhoids[254]. The whole plant is antirheumatic, astringent, balsamic, diuretic, emmenagogue, styptic, tonic and vermifuge[4, 7, 9, 21, 222]. It can be harvested at any time that it is in flower and is best used when fresh[4, 207, 238]. The dried herb should not be stored for more than a year[238]. The seeds can also be used[4]. An infusion of the plant has been used to treat diarrhoea and internal haemorrhages[213] or applied externally to treat gonorrhoea[213] and bleeding piles[7]. The leaves are experimentally hypoglycaemic[218]. The essential oil found in the leaves is used in the treatment of diarrhoea, dysentery and internal haemorrhages[4, 207, 218]. It is a uterine stimulant[213] and is also said to be valuable in the treatment of inflamed tonsils plus ulceration and inflammation of the throat[4]. A tea of the boiled roots is used to treat menstrual irregularities[213]. A homeopathic remedy is made from the plant[9]. It is used in the treatment of haemorrhoids and painful menstruation[9].
Other Uses
Essential.

The plant contains small quantities of essential oil[7]. Since the plant is readily obtainable, extraction of the oil is feasible - it has a special quality that would make it suitable in the making of perfumes with unusual nuances[7, 240].
Cultivation details
Prefers a well-drained light or medium neutral to alkaline soil in a sunny position, though it tolerates most conditions[238]. Originally from N. America, Canada fleabane has become naturalized in many areas of the world and is considered to be a nuisance weed in many areas[268]. The plant is very adaptable to differing conditions and can vary dramatically in height, from only a few centimetres in poor soils to as much as 3 metres tall in rich soils[213]. The plant is used commercially as a food flavouring[183]. A good bee plant[200] but unfortunately it also harbours various insect pests such as the tarnished plant bug[1].
Propagation
Seed - we have no information on this species but suggest sowing the seed in spring in situ. An autumn sowing in situ might also be worthwhile.
Other Names
Canadian fleabane. horseweed. Spanish: erigeron del Canada; escoba dura; hierba de caballo; hierba impia; olivarda. French: erigéron du Canada; vergerette du Canada. Portuguese: avoadinha. Canada: mare's tail. Colombia: cvenadillo. Cuba: conyza; zancarana. France: erigeron de Canada; vergerette de Canada. Germany: Kanadischer berufkraut; Kanadisher katzenschweif. India: jarayupriya. Iraq: thail el-faras. Italy: impi; saeppola. Japan: himemukashiyomogi. Madagascar: sarijamala. Mauritius: herbe gandi. Mexico: pegajosa. Netherlands: fijnstraal, Canadeese. Norway: canadese fijnstraal; hestehamp. Poland: przymiotno kasnadyjskie. Puerto Rico: pascueta; rozuz. South Africa: armoedskruid; kanadese skraalhans. Spain: altabaca; canem bord; erigeron de Canada; zamarraga. Sweden: kanadabinka. Turkey: sifa out. USA: butterweed; Canada horseweed; fireweed; hogweed. Yugoslavia (Serbia and Montenegro): repusnjaca.
Found In
Native throughout most of North America and Central America. It is also widely naturalized in Eurasia and Australia.
Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

A common weed in temperate to tropical regions.
Conservation Status
IUCN Red List of Threatened Plants Status : This taxon has not yet been assessed.
Related Plants
Plant Suppliers: Click here for a List

      You can download this page as a PDF

Due to a fault in the PDF printer we are trying a few different options. Please try the one below

 

Print Friendly and PDF
Expert comment
 
Author
(L.)Cronquist.
Botanical References
200
Links / References
For a list of references used on this page please go here
Readers comment
 
QR Code

What's this?

This is a QR code (short for Quick Response) which gives fast-track access to our website pages. QR Codes are barcodes that can be read by mobile phone (smartphone) cameras. This QR Code is unique to this page. All plant pages have their own unique code. For more information about QR Codes click here.

1. Copy and print the QR code to a plant label, poster, book, website, magazines, newspaper etc and even t-shirts.
2. Smartphone users scan the QR Code which automatically takes them to the webpage the QR Code came from.
3. Smartphone users quickly have information on a plant directly for the pfaf.org website on their phone.
Add a comment/link

If you have important information about this plant that may help other users please add a comment or link below. Only comments or links that are felt to be directly relevant to a plant will be included. If you think a comment/link or information contained on this page is inaccurate or misleading we would welcome your feedback at admin@pfaf.org. If you have questions about a plant please use the Forum on this website as we do not have the resources to answer questions ourselves.

* Please note: the comments by website users are not necessarily those held by PFAF and may give misleading or inaccurate information.

To leave a comment please Register or login here All comments need to be approved so will not appear immediately.

Subject : Conyza canadensis  

Plant Uses

Edible Uses
Medicinal Uses
Other Plant uses
Woodland Gardening
Why Perennial Plants?
Top Edible Plants
Top Medicinal Plants
Garden Design
Habitats
Translations

Twiter      Facebook

Content

Content Help
Bookshop
Support Us
Blog
Links
Old Database Search
Suppliers
Contact
About Us
News
Sign In

PFAF Newsletter

Stay informed about PFAFs progress,
challenges and hopes by signing up for
our free email ePost. You will receive
a range of benefits including:
* Important announcements and news
* Exclusive content not on the website
* Updates on new information &
functionality of the website & database

We will not sell or share your email address.
You can unsubscribe at anytime.