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Kingdonia
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Order:	Ranunculales
Family:	Circaeasteraceae
Genus:	Kingdonia Balf.f. & W.W.Sm.
Species:	K. uniflora
Binomial name
Kingdonia uniflora Balf.f. & W.W.Sm.

Kingdonia uniflora is a species of perennial herb native to China. The plants have one leaf and a 100-millimetre (4-inch) flower stalk with a 8 mm (3⁄8 in) flower.

It grows at high elevations in West and North China. Most of the plants are found in western Yunnan. It is an endangered species. Analysis of its draft genome hinted that its restricted distribution and endangered status relates to the loss of specific gene families.

Classification

Kingdonia is sometimes classified as the only genus in the family Kingdoniaceae or as a member of the family Circaeasteraceae along with Circaeaster agrestis, specifically in the APG III system of classification. Other sources may classify Kingdonia in the buttercup family, Ranunculaceae. In any case it is in the order Ranunculales.

References

1. ^ "Kingdonia uniflora". Flora of China.
2. Sun, Yanxia; Deng, Tao; Zhang, Aidi; Moore, Michael J.; Landis, Jacob B.; Lin, Nan; Zhang, Huajie; Zhang, Xu; Huang, Jinling; Zhang, Xiujun; Sun, Hang; Wang, Hengchang (2020). "Genome Sequencing of the Endangered Kingdonia uniflora (Circaeasteraceae, Ranunculales) Reveals Potential Mechanisms of Evolutionary Specialization". iScience. 23 (5): 101124. Bibcode:2020iSci...23j1124S. doi:10.1016/j.isci.2020.101124. ISSN 2589-0042. PMC 7232092. PMID 32428861.
3. Archived 3 January 2007 at the Wayback Machine/angio/www/kingdoni.htm Kingdoniaceae in L. Watson and M.J. Dallwitz (1992 onwards). /angio/ The families of flowering plants Archived 3 January 2007 at the Wayback Machine  : descriptions, illustrations, identification, information retrieval. Version: 3 May 2006. http://delta-intkey.com Archived 3 January 2007 at the Wayback Machine
4. Angiosperm Phylogeny Group (2009), "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III", Botanical Journal of the Linnean Society, 161 (2): 105–121, doi:10.1111/j.1095-8339.2009.00996.x, hdl:10654/18083
5. Nowicke, Joan W.; Skvarla, John J. (July 1982). "Pollen Morphology and the Relationships of Circaeaster, of Kingdonia, and of Sargentodoxa to the Ranunculales". American Journal of Botany. 69 (6). Botanical Society of America: 990–998. doi:10.2307/2442896. JSTOR 2442896.

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• Ranunculales
• Monotypic Ranunculales genera
• Flora of China
• Taxa named by Isaac Bayley Balfour
• Taxa named by William Wright Smith
• Ranunculales stubs