Packera paupercula

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]

Packera paupercula

Secure  (NatureServe)
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Packera
Species:
P. paupercula
Binomial name
Packera paupercula
(Michx.) Á.Löve & D.Löve
Synonyms[1]
  • Senecio pauperculus Michaux
  • Senecio balsamitae Muhlenberg ex Willdenow
  • Senecio crawfordii Britton
  • Senecio flavovirens Rydberg
  • Senecio gaspensis Greenman
  • Senecio multnomensis Greenman
  • Senecio tweedyi Rydberg

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
  • Variety pseduotomentosa is identified by its permanent tomentose pubescence and stoloniferous growth

References
  1. Trock, Debra K. (2006). "Packera paupercula". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). 20. New York and Oxford. Retrieved 2008-05-22 – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  2. Packera paupercula. NatureServe. 2012.
  3. Weakley, Alan (2015). "Flora of the Southern and Mid-Atlantic States".
  4. "Hylodesmum". plantsoftheworldonline.org. Royal Botanical Gardens, Kew. Retrieved 2019-09-02.
  5. 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.
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