Biology:Dioscorea villosa
| Dioscorea villosa | |
|---|---|
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Monocots |
| Order: | Dioscoreales |
| Family: | Dioscoreaceae |
| Genus: | Dioscorea |
| Species: | D. villosa
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| Binomial name | |
| Dioscorea villosa | |
| Synonyms[1] | |
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Dioscorea villosa is a species of twining tuberous vine which is native to eastern North America. It is commonly known as wild yam, colic root, rheumatism root, devil's bones, and fourleaf yam.[2] It is common and widespread in a range stretching from Texas and Florida north to Minnesota, Ontario and Massachusetts .[1][3][4][5][6]
Description
Dioscorea villosa flower petal color is commonly known to be green to brown, or white. Lengths of the flower petals range from .5 mm to 2 mm. The flowers tend to grow out of the axil; this is the point at which a branch or leaf attaches to the main stem. There is only one flower present on the inflorescence. The fruit of the plant is a capsule that splits and releases the seeds within to then begin the dispersal process[7] The fruit of Dioscorea villosa ranges in size from 10–30 mm.[8] The flower does not produce aerial bulblets.
Taxonomy
Synonyms of Dioscorea villosa include Dioscorea hirticaulis and Dioscorea villosa var. hirticaulis. Common names of Dioscorea villosa include wild yam, Atlantic yam, common wild yam, wild yam-root, yellow yam, colic root, and rheumatism root.[9][10][11]
Chemistry
Dioscorea villosa contains diosgenin, which despite claims is not a phytoestrogen and does not interact with estrogen receptors.[12] Other steroidal saponins are also found in the plant.[citation needed]
Medical use
Some of the English common names of this plant reflect its use in Native American and other traditional medicines.[13] In traditional Russian herbal medicine, saponin extracts from the roots of various varieties of wild yam are thought to be an anticoagulant, antisclerotic, antispasmodic, cholagogue, depurative, diaphoretic, diuretic and a vasodilator.[14]
There is little modern clinical research on Dioscorea villosa, and the one study of a wild yam-containing cream for menopausal symptoms failed to find any value from this therapy.[15] According to the American Cancer Society, there is no evidence to support wild yam or diosgenin being either safe or effective in humans.[16]
References
- ↑ 1.0 1.1 Kew World Checklist of Selected Plant Families
- ↑ Gotfredsen, Erik (16 Dec 2018). "Liber Herbarum II". http://www.liberherbarum.net/pn1475.HTM.
- ↑ Flora of North America
- ↑ Govaerts, R., Wilkin, P. & Saunders, R.M.K. (2007). World Checklist of Dioscoreales. Yams and their allies: 1-65. The Board of Trustees of the Royal Botanic Gardens, Kew.
- ↑ Biota of North America Program, 2013 county distribution map
- ↑ "United Plant Savers". 1 July 2018. https://unitedplantsavers.org/wild-yam-dioscorea-villosa-d-spp/.
- ↑ "Dioscorea villosa (wild yam): Go Botany". https://gobotany.nativeplanttrust.org/species/dioscorea/villosa/.
- ↑ "Dioscorea villosa (Colic root, Wild Yam, Yam-root) | North Carolina Extension Gardener Plant Toolbox". https://plants.ces.ncsu.edu/plants/dioscorea-villosa/.
- ↑ "NatureServe Explorer 2.0". https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.153733/Dioscorea_villosa.
- ↑ "Lady Bird Johnson Wildflower Center - The University of Texas at Austin". https://www.wildflower.org/plants/result.php?id_plant=divi4.
- ↑ "Wild Yam (Dioscorea villosa)". https://www.illinoiswildflowers.info/savanna/plants/wild_yam.html.
- ↑ "Diosgenin does not express estrogenic activity: A uterotrophic assay". Can J Physiol Pharmacol 92 (4): 292–8. 2014. doi:10.1139/cjpp-2013-0419. PMID 24708211..
- ↑ Austin, DF (2004). Florida Ethnobotany. Boca Raton: CRC Press. p. 267. ISBN 9780849323324. https://archive.org/details/floridaethnobota00aust.
- ↑ Zevin, Igor Vilevich. A Russian Herbal. 1997. Rochester, Vermont: Healing Arts Press. p.146-47.
- ↑ "Botanical and dietary supplements for menopausal symptoms: What works, what doesn't". J Womens Health (Larchmt) 14 (7): 634–49. 2005. doi:10.1089/jwh.2005.14.634. PMID 16181020..
- ↑ "Wild Yam". American Cancer Society. November 2008. http://www.cancer.org/treatment/treatmentsandsideeffects/complementaryandalternativemedicine/herbsvitaminsandminerals/wild-yam. Retrieved 21 September 2013.
Further reading
- http://www.nlm.nih.gov/medlineplus/druginfo/natural/970.html
- Eagon PK, Elm MS, Hunter DS, et al. Medicinal herbs: modulation of estrogen action. Era of Hope Mtg, Dept Defense; Breast Cancer Res Prog, Atlanta, GA 2000;Jun 8-11.
Wikidata ☰ Q309632 entry
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