Rugelia

Rugelia nudicaulis (Rugel's Indian plantain[1] or Rugels ragwort), the sole species of the genus Rugelia, blooms in summer. It is a wildflower endemic to higher elevations in the Great Smoky Mountains.[2] It is a rare species in Tennessee.[3] Genetic diversity in this plant, assessed using allozymes, is so low that the species may not survive changing environmental conditions.[4] Both the scientific name and the common names honor Ferdinand Rugel, a botanist and plant collector who collected plant specimens throughout the southeastern United States during the period 1840-1848\.

## Taxonomy

The monotypic genus Rugelia was described by the American botanist Alvan Wentworth Chapman in 1860.[5] In his description, Chapman attributed both the generic name Rugelia and the specific epithet nudicaulis to R.J. Shuttleworth.[6] The names honor Ferdinand Rugel,[7] the botanist who collected the type specimen of Rugelia nudicaulis in 1842.[8][9]

In 1883, the American botanist Asa Gray placed Rugelia nudicaulis in genus Senecio as Senecio rugelia.[10] In 1974, Senecio rugelia was placed in genus Cacalia as Cacalia rugelia.[11] As of December 2024[update], both Senecio rugelia A.Gray and Cacalia rugelia (A.Gray) T.M.Barkley & Cronquist are considered to be homotypic synonyms of Rugelia nudicaulis Shuttlew. ex Chapm.[8]

## References

1. ↑ "Rugelia nudicaulis". Natural Resources Conservation Service PLANTS Database. USDA. https://plants.usda.gov/core/profile?symbol=RUNU2. Retrieved 26 October 2015.
2. ↑ University of Tennessee Herbarium
3. ↑ Tennessee state list
4. ↑ Journal of Heredity article
5. ↑ "Rugelia Shuttlew. ex Chapm.". International Plant Names Index (IPNI). Royal Botanic Gardens, Kew. https://www.ipni.org/n/10889-1.Shuttlew.+ex+Chapm.&rft.atitle=[[Biology:International+Plant+Names+Index|International+Plant+Names+Index]]+(IPNI)&rft.pub=Royal+Botanic+Gardens,+Kew&rft_id=https://www.ipni.org/n/10889-1&rfr_id=info:sid/en.wikibooks.org:Biology:Rugelia">
6. ↑ Chapman & Eaton (1865), p. 246.
7. ↑ "Ferdinand Ignatius Xavier Rugel". International Plant Names Index (IPNI). Royal Botanic Gardens, Kew. https://www.ipni.org/a/8725-1.
8. ↑ 8.0 8.1 "Rugelia nudicaulis Shuttlew. ex Chapm." (in en). Royal Botanic Gardens, Kew. http://www.plantsoftheworldonline.org/taxon/315830-2.Shuttlew.+ex+Chapm.&rft.atitle=&rft.pub=[[Organization:Royal+Botanic+Gardens,+Kew|Royal+Botanic+Gardens,+Kew]]&rft_id=http://www.plantsoftheworldonline.org/taxon/315830-2&rfr_id=info:sid/en.wikibooks.org:Biology:Rugelia">
9. ↑ "Specimen K000802981: Rugelia nudicaulis Shuttlew. ex Chapm.". Royal Botanic Gardens, Kew. https://records.data.kew.org/occurrences/c237b514-3910-4292-8ec5-a7874bf6ba19.Shuttlew.+ex+Chapm.&rft.atitle=&rft.pub=Royal+Botanic+Gardens,+Kew&rft_id=https://records.data.kew.org/occurrences/c237b514-3910-4292-8ec5-a7874bf6ba19&rfr_id=info:sid/en.wikibooks.org:Biology:Rugelia">
10. ↑ "Senecio rugelia A.Gray". International Plant Names Index (IPNI). Royal Botanic Gardens, Kew. https://www.ipni.org/n/233928-2.A.Gray&rft.atitle=[[Biology:International+Plant+Names+Index|International+Plant+Names+Index]]+(IPNI)&rft.pub=Royal+Botanic+Gardens,+Kew&rft_id=https://www.ipni.org/n/233928-2&rfr_id=info:sid/en.wikibooks.org:Biology:Rugelia">
11. ↑ "Cacalia rugelia (A.Gray) T.M.Barkley & Cronquist". International Plant Names Index (IPNI). Royal Botanic Gardens, Kew. https://www.ipni.org/n/39383-2.(A.Gray)+T.M.Barkley+&+Cronquist&rft.atitle=[[Biology:International+Plant+Names+Index|International+Plant+Names+Index]]+(IPNI)&rft.pub=Royal+Botanic+Gardens,+Kew&rft_id=https://www.ipni.org/n/39383-2&rfr_id=info:sid/en.wikibooks.org:Biology:Rugelia">

* Horn, Cathcart, Hemmerly, Duhl, Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians, Lone Pine Publishing, (2005) p 372, ISBN 978-1-55105-428-5

## Bibliography

* Chapman, Alvan Wentworth; Eaton, Daniel Cady (1865). Flora of the southern United States. New York: Ivison, Phinney & Co.. https://www.biodiversitylibrary.org/bibliography/7711. Retrieved 13 December 2024.

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