Ranunculus acris

Ranunculus acris is a species of flowering plant in the family Ranunculaceae, and is one of the more common buttercups across Europe and temperate Eurasia. Common names include meadow buttercup,[1] tall buttercup,[2] common buttercup and giant buttercup.

"Common buttercup" redirects here. For the Australian plant, see Ranunculus lappaceus.

Ranunculus acris
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Ranunculales
Family: Ranunculaceae
Genus: Ranunculus
Species:
R. acris
Binomial name
Ranunculus acris
Synonyms
  • R. acer auct.
  • R. stevenii Beck

Description

Ranunculus acris is a herbaceous perennial plant that grows to a height of 30 to 70 cm, with ungrooved flowing stems bearing glossy yellow flowers about 25 mm across. There are five overlapping petals borne above five green sepals that soon turn yellow as the flower matures. It has numerous stamens inserted below the ovary. The leaves are compound, with three lobed leaflets. Unlike Ranunculus repens, the terminal leaflet is sessile. As with other members of the genus, the numerous seeds are borne as achenes. This and other buttercups contain ranunculin, which breaks down to the toxin protoanemonin, a chemical that can cause dermatitis and vomiting.

The rare autumn buttercup (R. aestivalis) is sometimes treated as a variety of this species.[3]

The juice of the plant is semi-poisonous to livestock, causing blistering.[4]

Distribution

The plant is native to Eurasia, but has been introduced across much of the world so that it now has a circumpolar distribution.[5] It is a naturalized species and often a weed in parts of North America,[6] but it is probably native in Alaska and Greenland.[7] In New Zealand it is a serious pasture weed costing the dairy industry hundreds of millions of dollars.[8] It has become one of the few pasture weeds that has developed a resistance to herbicides.[9]

Cultivation

In horticulture the species may be regarded as a troublesome weed, colonising lawns and paths. However, it may be a welcome feature of wildflower meadows. The double-flowered cultivar R. acris 'Flore Pleno' has gained the Royal Horticultural Society's Award of Garden Merit.[10][11]

Uses by Native Americans

The Abenaki smash the flowers and leaves and sniff them for headaches.[12] The Bella Coola apply a poultice of pounded roots to boils.[13] The Micmac use the leaves for headaches.[14] The Montagnais inhale the crushed leaves for headaches.[15]

The Cherokee use it as a poultice for abscesses, use an infusion for oral thrush, and use the juice as a sedative.[16] They also cook the leaves and eat them as greens.[16]

The Iroquois apply a poultice of the smashed plant to the chest for pains and for colds, take an infusion of the roots for diarrhea,[17] and apply a poultice of plant fragments with another plant to the skin for excess water in the blood.[18]

gollark: IIRC EMPs mostly induce currents in longer wires.
gollark: Doubtful, datacentres have a lot of backup power and mostly use nonvolatile memory.
gollark: It says "through disease or starvation", which sounds right.
gollark: Over the long term, no electricity means industrial farming and water supply collapse.
gollark: Me too. Also a slimesling.

References
  1. "BSBI List 2007". Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-01-25. Retrieved 2014-10-17.
  2. "Ranunculus acris". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 18 October 2015.
  3. USDA Plants Profile: R. aestivalis.
  4. Common Weeds of the United States. New York: Dover. 1971. p. 186. ISBN 0-486-20504-5.
  5. "Ranunculus acris". Online Atlas of the British and Irish Flora. Biological Records Centre and Botanical Society of Britain and Ireland. Retrieved 27 April 2020.
  6. Invasive Weeds of King County, Washington
  7. Flora of North America
  8. Bourdôt, GW; Saville DJ (2010-08-31). "Giant buttercup - a threat to sustainable dairy farming in New Zealand". Proceedings of the Australasian Dairy Science Symposium: 355–359.
  9. Cronshaw, Tim (18 May 2012). "Profit-strangling weed immune to hebicides". The Press.
  10. "RHS Plant Selector - Ranunculus acris 'Flore Pleno'". Retrieved 30 May 2013.
  11. "AGM Plants - Ornamental" (PDF). Royal Horticultural Society. July 2017. p. 84. Retrieved 23 September 2018.
  12. Rousseau, Jacques 1947 Ethnobotanique Abenakise. Archives de Folklore 11:145-182 (p. 166)
  13. Smith, Harlan I. 1929 Materia Medica of the Bella Coola and Neighboring Tribes of British Columbia. National Museum of Canada Bulletin 56:47-68 (p. 57)
  14. Chandler, R. Frank, Lois Freeman and Shirley N. Hooper 1979 Herbal Remedies of the Maritime Indians. Journal of Ethnopharmacology 1:49-68 (p. 60)
  15. Speck, Frank G. 1917 Medicine Practices of the Northeastern Algonquians. Proceedings of the 19th International Congress of Americanists Pp. 303-321 (p. 315)
  16. Hamel, Paul B. and Mary U. Chiltoskey 1975 Cherokee Plants and Their Uses -- A 400 Year History. Sylva, N.C. Herald Publishing Co. (p. 31)
  17. Herrick, James William 1977 Iroquois Medical Botany. State University of New York, Albany, PhD Thesis (p. 320)
  18. Rousseau, Jacques 1945 Le Folklore Botanique De Caughnawaga. Contributions de l'Institut botanique l'Universite de Montreal 55:7-72 (p. 42)
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