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Uses

Toxic parts

Skin contact with the plant can cause dermatitis in some people[1].

Edible uses

Notes

Young leaves and seedlings - cooked[2][3]. Boiled, cooked in rice or dried for later use[4]. A nutritional analysis of the leaves is available[5]. The source of an essential oil that is used commercially for flavouring sweets, condiments and soft drinks[4]. The fresh leaves contain 0.2 - 0.66% essential oil[5].

Unknown part

Leaves

Material uses

The plant contains small quantities of essential oil[6]. 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[6][7].

Unknown part

Medicinal uses(Warning!)

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[8]. Nowadays it is valued most for its astringency, being used in the treatment of gastro-intestinal problems such as diarrhoea and dysentery[8]. It is said to be a very effective treatment for bleeding haemorrhoids[8].

The whole plant is antirheumatic, astringent, balsamic, diuretic, emmenagogue, styptic, tonic and vermifuge[9][6][10][11][1]. It can be harvested at any time that it is in flower and is best used when fresh[9][12][13]. The dried herb should not be stored for more than a year[13]. The seeds can also be used[9]. An infusion of the plant has been used to treat diarrhoea and internal haemorrhages[14] or applied externally to treat gonorrhoea[14] and bleeding piles[6]. The leaves are experimentally hypoglycaemic[5]. The essential oil found in the leaves is used in the treatment of diarrhoea, dysentery and internal haemorrhages[9][12][5]. It is a uterine stimulant[14] and is also said to be valuable in the treatment of inflamed tonsils plus ulceration and inflammation of the throat[9]. A tea of the boiled roots is used to treat menstrual irregularities[14].

A homeopathic remedy is made from the plant[10]. It is used in the treatment of haemorrhoids and painful menstruation[10].

Ecology

Ecosystem niche/layer

Ecological Functions

Nothing listed.

Forage

Nothing listed.

Shelter

Nothing listed.

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.

Practical Plants is currently lacking information on propagation instructions of Conyza canadensis. Help us fill in the blanks! Edit this page to add your knowledge.



Cultivation

Prefers a well-drained light or medium neutral to alkaline soil in a sunny position, though it tolerates most conditions[13].

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[15]. 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[14]. The plant is used commercially as a food flavouring[4].

A good bee plant[16] but unfortunately it also harbours various insect pests such as the tarnished plant bug[17].

Crops

Problems, pests & diseases

Associations & Interactions

There are no interactions listed for Conyza canadensis. Do you know of an interaction that should be listed here? edit this page to add it.

Polycultures & Guilds

There are no polycultures listed which include Conyza canadensis.

Descendants

Cultivars

Varieties

None listed.

Subspecies

None listed.

Full Data

This table shows all the data stored for this plant.

Taxonomy
Binomial name
Conyza canadensis
Genus
Conyza
Family
Compositae
Imported References
Material uses & Functions
Botanic
Propagation
Cultivation
Environment
Cultivation
Uses
Edible uses
None listed.
Material uses
None listed.
Medicinal uses
None listed.
Functions & Nature
Functions
Provides forage for
Provides shelter for
Environment
Hardiness Zone
7
Heat Zone
?
Water
moderate
Sun
full sun
Shade
light shade
Soil PH
Soil Texture
Soil Water Retention
Environmental Tolerances
  • Drought
Ecosystems
Native Climate Zones
None listed.
Adapted Climate Zones
None listed.
Native Geographical Range
None listed.
Native Environment
None listed.
Ecosystem Niche
None listed.
Root Zone Tendancy
None listed.
Life
Deciduous or Evergreen
?
Herbaceous or Woody
?
Life Cycle
Growth Rate
?
Mature Size
Fertility
?
Pollinators
Flower Colour
?
Flower Type

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References

  1. ? 1.01.11.2 Foster. S. & Duke. J. A. A Field Guide to Medicinal Plants. Eastern and Central N. America. Houghton Mifflin Co. ISBN 0395467225 (1990-00-00)
  2. ? 2.02.1 Tanaka. T. Tanaka's Cyclopaedia of Edible Plants of the World. Keigaku Publishing (1976-00-00)
  3. ? 3.03.1 Kunkel. G. Plants for Human Consumption. Koeltz Scientific Books ISBN 3874292169 (1984-00-00)
  4. ? 4.04.14.24.3 Facciola. S. Cornucopia - A Source Book of Edible Plants. Kampong Publications ISBN 0-9628087-0-9 (1990-00-00)
  5. ? 5.05.15.25.35.45.5 Duke. J. A. and Ayensu. E. S. Medicinal Plants of China Reference Publications, Inc. ISBN 0-917256-20-4 (1985-00-00)
  6. ? 6.06.16.26.36.46.5 Chiej. R. Encyclopaedia of Medicinal Plants. MacDonald ISBN 0-356-10541-5 (1984-00-00)
  7. ? 7.07.1 Chopra. R. N., Nayar. S. L. and Chopra. I. C. Glossary of Indian Medicinal Plants (Including the Supplement). Council of Scientific and Industrial Research, New Delhi. (1986-00-00)
  8. ? 8.08.18.28.3 Chevallier. A. The Encyclopedia of Medicinal Plants Dorling Kindersley. London ISBN 9-780751-303148 (1996-00-00)
  9. ? 9.09.19.29.39.49.5 Grieve. A Modern Herbal. Penguin ISBN 0-14-046-440-9 (1984-00-00)
  10. ? 10.010.110.210.3 Launert. E. Edible and Medicinal Plants. Hamlyn ISBN 0-600-37216-2 (1981-00-00)
  11. ? 11.011.1 Lust. J. The Herb Book. Bantam books ISBN 0-553-23827-2 (1983-00-00)
  12. ? 12.012.112.2 Coffey. T. The History and Folklore of North American Wild Flowers. Facts on File. ISBN 0-8160-2624-6 (1993-00-00)
  13. ? 13.013.113.213.3 Bown. D. Encyclopaedia of Herbs and their Uses. Dorling Kindersley, London. ISBN 0-7513-020-31 (1995-00-00)
  14. ? 14.014.114.214.314.414.5 Weiner. M. A. Earth Medicine, Earth Food. Ballantine Books ISBN 0-449-90589-6 (1980-00-00)
  15. ? Stuart. M. (Editor) The Encyclopedia of Herbs and Herbalism Orbis Publishing. London. ISBN 0-85613-067-2 (1979-00-00)
  16. ? 16.016.1 Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press ISBN 0-333-47494-5 (1992-00-00)
  17. ? F. Chittendon. RHS Dictionary of Plants plus Supplement. 1956 Oxford University Press (1951-00-00)

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