Packera paupercula
| Packera paupercula | |
|---|---|
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Packera |
| Species: | P. paupercula
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| Binomial name | |
| Packera paupercula | |
| Synonyms[1] | |
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Packera paupercula is a flowering plant species of the genus Packera and family Asteraceae, native to North America, where it is widespread across Canada and much of the United States.[1] Its common names include balsam ragwort and balsam groundsel.[2]
It flowers as early as April in the southern part of its range, and as late as August in the northern part of its range.[1][3]
Taxonomy
Packera paupercula taxonomically complex, with varying amounts of infraspecific taxa recognized by different authorities. No single classification to date has received wide acceptance.[1][3] The Royal Botanic Gardens, Kew currently recognizes the following varieties:[4][5]
- P. paupercula var. appalachiana - Restricted to the Appalachian Mountains
- P. paupercula var. paupercula - Widespread from Newfoundland to Alaska, south through the Rocky Mountains and Appalachians
- P. paupercula var. pseudotomentosa - Native to the Midwest, Upper South, and Ontario
- P. paupercula var. savannarum - Restricted to the upper Midwest
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Variety pseduotomentosa is identified by its permanent tomentose pubescence and stoloniferous growth
References
- ^ a b c d Trock, Debra K. (2006). "Packera paupercula". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 20. New York and Oxford: Oxford University Press. Retrieved 2008-05-22 – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
- ^ Packera paupercula. NatureServe. 2012.
- ^ a b Weakley, Alan (2015). "Flora of the Southern and Mid-Atlantic States".
- ^ "Hylodesmum". plantsoftheworldonline.org. Royal Botanical Gardens, Kew. Retrieved 2019-09-02.
- ^ Mahoney, Alison; Kowal, Robert (1 May 2008). "Three New Varieties of Packera paupercula (Asteraceae, Senecioneae) in Midwestern and Southeastern North America". Novon: A Journal for Botanical Nomenclature. 18 (2): 220–228. doi:10.3417/2006016. Retrieved 2 September 2019.
External links
Media related to Packera paupercula at Wikimedia Commons
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