''Packera'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

of about 64 species of plants in the daisy family,

Asteraceae The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae ...

. Most species are commonly called ragworts or grounsels. Its members were previously included in the genus ''

Senecio ''Senecio'' is a genus of flowering plants in the daisy family (Asteraceae) that includes ragworts and groundsels. Variously circumscribed taxonomically, the genus ''Senecio'' is one of the largest genera of flowering plants. Description Morp ...

'' (where they were called ''aureoid senecios'' by

Asa Gray Asa Gray (November 18, 1810 – January 30, 1888) is considered the most important American botanist of the 19th century. His '' Darwiniana'' was considered an important explanation of how religion and science were not necessarily mutually ex ...

), but were divided out based on

chromosome number Ploidy () is the number of complete sets of chromosomes in a cell, and hence the number of possible alleles for autosomal and pseudoautosomal genes. Sets of chromosomes refer to the number of maternal and paternal chromosome copies, respectiv ...

s, a variety of morphological characters, and

molecular phylogeny Molecular phylogenetics () is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to ...

Species

* '' Packera anonyma'' (Wood) W.A. Weber & A. Löve − Small's ragwort * ''

Packera antennariifolia ''Packera antennariifolia'', the shale barren ragwort, is a species of the genus '' Packera'' and family Asteraceae. It is endemic to Maryland, Pennsylvania, Virginia, and West Virginia. It is found in the Appalachian Mountains. Refere ...

'' (Britt.) W.A. Weber & A. Löve − shalebarren ragwort * ''

Packera aurea ''Packera aurea'' (formerly ''Senecio aureus''), commonly known as golden ragwort or simply ragwort, is a perennial flower in the family Asteraceae. It is also known as golden groundsel, squaw weed, life root, golden ''Senecio'', uncum, uncum ro ...

'' ( L.) A.& D. Löve − golden ragwort ** ''Senecio aureus'' L. * '' Packera bernardina'' (Greene) W.A. Weber & A. Löve − San Bernardino ragwort * ''

Packera bolanderi ''Packera bolanderi'' is a species of flowering plant in the aster family known by the common names Bolander's ragwort and seacoast ragwort. It is native to the west coast of the United States from Washington to northern California, where it gro ...

'' (Gray) W.A. Weber & A. Löve − Bolander's ragwort * '' Packera breweri'' (Burtt-Davy) W.A. Weber & A. Löve − Brewer's ragwort ** ''Senecio breweri'' Burtt-Davy * ''

Packera cana ''Packera cana'' is a species of flowering plant in the aster family known by the common name woolly groundsel. It is native to western and central North America, where it can be found in a wide array of habitat types at all elevations from gra ...

'' (Hook.) W.A. Weber & A. Löve − woolly groundsel * ''

Packera cardamine ''Packera cardamine'' is a species of flowering plant in the Asteraceae, aster family known by the common name bittercress ragwort. It is endemic to Arizona and New Mexico in the Southwestern United States. References

Packera, cana Flor ...

'' (Greene) W.A. Weber & A. Löve − bittercress ragwort * ''

Packera castoreus ''Packera castoreus'' is a rare species of flowering plant in the aster family known by the common names Beaver Mountain groundsel and Beaver Mountain ragwort. It is endemic to Utah in the United States, where it occurs only in the Tushar Mo ...

'' (Welsh) Kartesz, comb. nov. ined. − Beaver Mountain ragwort * '' Packera clevelandii'' (Greene) W.A. Weber & A. Löve − Cleveland's ragwort ** ''Senecio clevelandii'' Greene * '' Packera contermina'' (Greenm.) T.M. Barkl., comb. nov. ined. * '' Packera crocata'' (Rydb.) W.A. Weber & A. Löve − saffron ragwort * '' Packera cymbalaria'' (Pursh) W.A. Weber & A. Löve − dwarf arctic ragwort * '' Packera cymbalarioides'' (Buek) W.A. Weber & A. Löve − cleftleaf groundsel * ''

Packera cynthioides ''Packera'' is a genus of about 64 species of plants in the daisy family, Asteraceae. Most species are commonly called ragworts or grounsels. Its members were previously included in the genus ''Senecio'' (where they were called ''aureoid senecios ...

'' (Greene) W.A. Weber & A. Löve − White Mountain ragwort ** ''Senecio cynthiodes'' Greene * ''

Packera debilis ''Packera'' is a genus of about 64 species of plants in the daisy family, Asteraceae. Most species are commonly called ragworts or grounsels. Its members were previously included in the genus ''Senecio'' (where they were called ''aureoid senecios ...

'' (Nutt.) W.A. Weber & A. Löve − weak groundsel * ''

Packera dimorphophylla ''Packera'' is a genus of about 64 species of plants in the daisy family, Asteraceae. Most species are commonly called ragworts or grounsels. Its members were previously included in the genus ''Senecio'' (where they were called ''aureoid senecios ...

'' (Greene) W.A. Weber & A. Löve − splitleaf groundsel * '' Packera eurycephala'' (Torr. & Gray ex Gray) W.A. Weber & A. Löve − widehead groundsel * ''

Packera fendleri ''Packera'' is a genus of about 64 species of plants in the daisy family, Asteraceae. Most species are commonly called ragworts or grounsels. Its members were previously included in the genus ''Senecio'' (where they were called ''aureoid senecios ...

'' (Gray) W.A. Weber & A. Löve − Fendler's ragwort * ''

Packera flettii ''Packera'' is a genus of about 64 species of plants in the daisy family, Asteraceae. Most species are commonly called ragworts or grounsels. Its members were previously included in the genus ''Senecio'' (where they were called ''aureoid senecios ...

'' (Wieg.) W.A. Weber & A. Löve − Flett's ragwort * ''

Packera franciscana ''Packera franciscana'' (syn. ''Senecio franciscanus'') is a rare species of flowering plant in the aster family known by the common name San Francisco Peaks groundsel, or San Francisco Peaks ragwort. It is endemic to Arizona in the United State ...

'' (Greene) W.A. Weber & A. Löve − San Francisco Peaks ragwort ** ''Senecio franciscanus'' Greene − San Francisco Peaks groundsel * ''

Packera ganderi ''Packera ganderi'' is a rare species of flowering plant in the aster family known by the common name Gander's ragwort. It is endemic to southern California, where it is known from a few occurrences in San Diego and Riverside Counties. The ...

'' (T.M. Barkl. & Beauchamp) W.A. Weber & A. Löve − Gander's ragwort * ''

Packera glabella ''Packera glabella'' (formerly ''Senecio glabellus'') is one of several plants with the common name butterweed, this one has also been called cressleaf groundsel and yellowtop. It is native to central and southeastern North America. It is toxic ...

'' (Poir) C. Jeffrey − butterweed ** ''Senecio glabellus'' Poir. * ''

Packera greenei ''Packera greenei'' is a species of flowering plant in the aster family known by the common name flame ragwort. It is endemic to northern California, where it is known from the North Coast Ranges and southern Klamath Mountains. It is a reside ...

'' (Gray) W.A. Weber & A. Löve − flame ragwort * ''

Packera hartiana ''Packera'' is a genus of about 64 species of plants in the daisy family, Asteraceae. Most species are commonly called ragworts or grounsels. Its members were previously included in the genus ''Senecio'' (where they were called ''aureoid senecios ...

'' (Heller) W.A. Weber & A. Löve − Hart's ragwort * ''

Packera hesperia ''Packera'' is a genus of about 64 species of plants in the daisy family, Asteraceae. Most species are commonly called ragworts or grounsels. Its members were previously included in the genus ''Senecio'' (where they were called ''aureoid senecios ...

'' (Greene) W.A. Weber & A. Löve − western ragwort * ''

Packera hyperborealis ''Packera'' is a genus of about 64 species of plants in the daisy family, Asteraceae. Most species are commonly called ragworts or grounsels. Its members were previously included in the genus '' Senecio'' (where they were called ''aureoid senec ...

'' (Greenm.) A.& D. Löve − northern groundsel * ''

Packera indecora ''Packera indecora'' is a species of flowering plant in the aster family known by the common names elegant groundsel and rayless mountain ragwort. It is native to northern North America including most of Canada and sections of the northernmost U ...

'' (Greene) A.& D. Löve − elegant groundsel *''Packera insulae-regalis'' R.R. Kowal − Isle Royale ragwort * '' Packera ionophylla'' (Greene) W.A. Weber & A. Löve − Tehachapi ragwort * '' Packera layneae'' (Greene) W.A. Weber & A. Löve − Layne's ragwort * ''

Packera macounii ''Packera macounii'' is a species of flowering plant in the aster family known by the common name Siskiyou Mountains ragwort. It is native to the west coast of North America from British Columbia to far northern California, where it grows in cha ...

'' (Greene) W.A. Weber & A. Löve − Siskiyou Mountain ragwort * ''

Packera malmstenii ''Packera malmstenii'' is a rare species of flowering plant in the aster family known by the common name Podunk ragwort. It is endemic to Utah in the United States, where there about 19 occurrences in the southwestern part of the state.

'' (Blake ex Tidestrom) Kartesz, comb. nov. ined. − Podunk ragwort * ''

Packera millefolia ''Packera'' is a genus of about 64 species of plants in the daisy family, Asteraceae. Most species are commonly called ragworts or grounsels. Its members were previously included in the genus ''Senecio'' (where they were called ''aureoid senecios ...

'' (Torr. & Gray) T.M. Barkl., comb. nov. ined. − piedmont ragwort ** ''Packera millefolium'' (Torr. & A. Gray) W.A. Weber & A. Löve ** ''Senecio millefolium'' Torr. & Gray * ''

Packera millelobata ''Packera'' is a genus of about 64 species of plants in the daisy family, Asteraceae. Most species are commonly called ragworts or grounsels. Its members were previously included in the genus ''Senecio'' (where they were called ''aureoid senecios ...

'' (Rydb.) W.A. Weber & A. Löve − Uinta ragwort * ''

Packera moresbiensis ''Packera'' is a genus of about 64 species of plants in the daisy family, Asteraceae. Most species are commonly called ragworts or grounsels. Its members were previously included in the genus ''Senecio'' (where they were called ''aureoid senecios ...

'' (Calder & Roy L. Taylor) J.F. Bain – Cleftleaf ragwort * ''

Packera multilobata ''Packera multilobata'' is a species of flowering plant in the aster family known by the common name lobeleaf groundsel. It is native to the western United States from California to Wyoming to New Mexico, where it is common and can be found in ...

'' (Torr. & Gray ex Gray) W.A. Weber & A. Löve − lobeleaf groundsel ** ''Senecio multilobatus'' Torr. & Gray ex Gray * ''

Packera musiniensis ''Packera musiniensis'' is a rare species of flowering plant in the aster family known by the common names Musinea ragwort and Musinea groundsel. It is endemic to Utah in the United States, where it is known only from Sanpete County in the M ...

'' (S. L. Welsh) Trock * ''

Packera neomexicana ''Packera'' is a genus of about 64 species of plants in the daisy family, Asteraceae. Most species are commonly called ragworts or grounsels. Its members were previously included in the genus '' Senecio'' (where they were called ''aureoid senec ...

'' (Gray) W.A. Weber & A. Löve − New Mexico groundsel * ''

Packera obovata ''Packera obovata'', commonly known as roundleaf ragwort, spoon-leaved ragwort, roundleaf groundsel, or squaw-weed, is an erect perennial herb in the Asteraceae (aster) family native to eastern North America. It was previously called ''Senecio ob ...

'' (Muhl. ex Willd.) W.A. Weber & A. Löve − roundleaf ragwort ** ''Senecio obovatus'' Muhl. ex Willd. * '' Packera ogotorukensis'' (Packer) A.& D. Löve − Ogotoruk Creek ragwort * ''

Packera pauciflora ''Packera pauciflora'' is a species of flowering plant in the aster family known by the common name alpine groundsel. It is native to northern North America, where it can be found in parts of western and eastern Canada and the northwestern Unit ...

'' (Pursh) A.& D. Löve − alpine groundsel * ''

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. Its common names include balsam ragwort and balsam g ...

'' (Michx.) A.& D. Löve − balsam groundsel * ''

Packera plattensis '' Packera plattensis'', commonly known as prairie ragwort or prairie groundsel, is a species of the genus '' Packera'' and family Asteraceae. It used to be placed in the genus '' Senecio''. Prairie groundsel is found throughout the tallgras ...

'' (Nutt.) W.A. Weber & A. Löve − prairie groundsel ** ''Senecio plattensis'' Nutt. * '' Packera porteri'' (Greene) C. Jeffrey − Porter's groundsel * ''

Packera pseudaurea ''Packera pseudaurea'' is a species of flowering plant in the aster family known by the common name falsegold groundsel. It is native to North America, where it can be found in western and central parts of Canada and the United States. It grows ...

'' (Rydb.) W.A. Weber & A. Löve − falsegold groundsel * ''

Packera quaerens ''Packera'' is a genus of about 64 species of plants in the daisy family, Asteraceae. Most species are commonly called ragworts or grounsels. Its members were previously included in the genus ''Senecio'' (where they were called ''aureoid senecios ...

'' (Greene) W.A. Weber & A. Löve − Mogollon Mountain ragwort ** ''Senecio quaerens'' Greene * ''

Packera quercetorum ''Packera'' is a genus of about 64 species of plants in the daisy family, Asteraceae. Most species are commonly called ragworts or grounsels. Its members were previously included in the genus '' Senecio'' (where they were called ''aureoid senec ...

'' (Greene) C. Jeffrey − Oak Creek ragwort * ''

Packera sanguisorboides ''Packera'' is a genus of about 64 species of plants in the daisy family, Asteraceae. Most species are commonly called ragworts or grounsels. Its members were previously included in the genus '' Senecio'' (where they were called ''aureoid senec ...

'' (Rydb.) W.A. Weber & A. Löve − burnet ragwort * ''

Packera schweinitziana ''Packera schweinitziana'', commonly called New England groundsel, is a species of flowering plant in the aster family ( Asteraceae). It is native to eastern North America, where it is primarily found in eastern Canada and the northeastern United ...

'' (Nutt.) W.A. Weber & A. Löve − Schweinitz's ragwort ** ''Senecio schweinitzianus'' Nutt. * ''

Packera serpenticola ''Packera serpenticola'', commonly known as serpentine ragwort, is a species of flowering plant in the composite family. It is native to the Southeastern United States, where it is known only from a single site in Clay County, North Carolina, ...

'' Boufford, Kartesz, S.H. Shi & Renchao Zhou − serpentine ragwort * '' Packera spellenbergii'' (T.M. Barkl.) C. Jeffrey − Carrizo Creek ragwort * ''

Packera streptanthifolia ''Packera streptanthifolia'' is a species of flowering plant in the aster family known by the common name Rocky Mountain groundsel. It is native to western North America from Alaska to California to New Mexico, where it can be found in mountain ...

'' (Greene) W.A. Weber & A. Löve − Rocky Mountain groundsel * ''

Packera subnuda ''Packera subnuda'' is a species of flowering plant in the aster family known by the common names Buek's groundsel and cleftleaf groundsel. It is native to western North America from the Northwest Territories to northern California to Wyoming, ...

'' (DC.) D.K. Trock & T.M. Barkley – Buek's groundsel * ''

Packera tampicana ''Packera'' is a genus of about 64 species of plants in the daisy family, Asteraceae. Most species are commonly called ragworts or grounsels. Its members were previously included in the genus '' Senecio'' (where they were called ''aureoid senec ...

'' (DC.) C. Jeffrey − Great Plains ragwort * ''

Packera tomentosa ''Packera dubia'', synonym ''Packera tomentosa'', is a species of flowering plant in the composite family. It is known by the common name woolly ragwort. It is native to the Southeastern United States The Southeastern United States, also ...

'' (Michx.) C. Jeffrey − woolly ragwort * '' Packera tridenticulata'' (Rydb.) W.A. Weber & A. Löve − threetooth ragwort * ''

Packera werneriifolia ''Packera werneriifolia'', known by the common names alpine rock butterweed and hoary groundsel, is a species of flowering plant in the aster family. It is native to the western United States in the Sierra Nevada The Sierra Nevada () is a ...

'' (Gray) W.A. Weber & A. Löve − hoary groundsel Sources: NRCS

References

Asteraceae genera {{Senecioneae-stub