''Packera'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

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 w ...

. 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 excl ...

), 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, respectively ...

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 ''Packera anonyma'', called Appalachian ragwort and Small's ragwort, is a flowering plant in the Asteraceae (aster family). Distribution and habitat The perennial herb is native to the lower Northeastern United States and across the Southeastern ...

'' (Wood) W.A. Weber & A. Löve − Small's ragwort * '' Packera antennariifolia'' (Britt.) W.A. Weber & A. Löve − shalebarren ragwort * '' Packera aurea'' ( L.) A.& D. Löve − golden ragwort ** ''Senecio aureus'' L. * ''

Packera bernardina ''Packera bernardina'' is a rare species of flowering plant in the aster family known by the common name San Bernardino ragwort. Distribution The perennial herb is endemic to the San Bernardino Mountains of southern California, where it is know ...

'' (Greene) W.A. Weber & A. Löve − San Bernardino ragwort * '' Packera bolanderi'' (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'' (Hook.) W.A. Weber & A. Löve − woolly groundsel * '' Packera cardamine'' (Greene) W.A. Weber & A. Löve − bittercress ragwort * '' Packera castoreus'' (Welsh) Kartesz, comb. nov. ined. − Beaver Mountain ragwort * '' Packera clevelandii'' (Greene) W.A. Weber & A. Löve − Cleveland's ragwort ** ''Senecio clevelandii'' Greene * ''

Packera contermina ''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 ...

'' (Greenm.) T.M. Barkl., comb. nov. ined. * ''

Packera crocata ''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 − saffron ragwort * ''

Packera cymbalaria ''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 ...

'' (Pursh) W.A. Weber & A. Löve − dwarf arctic ragwort * ''

Packera cymbalarioides ''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 ...

'' (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'' (Greene) W.A. Weber & A. Löve − San Francisco Peaks ragwort ** ''Senecio franciscanus'' Greene − San Francisco Peaks groundsel * '' Packera ganderi'' (T.M. Barkl. & Beauchamp) W.A. Weber & A. Löve − Gander's ragwort * '' Packera glabella'' (Poir) C. Jeffrey − butterweed ** ''Senecio glabellus'' Poir. * '' Packera greenei'' (Gray) W.A. Weber & A. Löve − flame ragwort * '' Packera hartiana'' (Heller) W.A. Weber & A. Löve − Hart's ragwort * '' Packera hesperia'' (Greene) W.A. Weber & A. Löve − western ragwort * '' Packera hyperborealis'' (Greenm.) A.& D. Löve − northern groundsel * '' Packera indecora'' (Greene) A.& D. Löve − elegant groundsel *''Packera insulae-regalis'' R.R. Kowal − Isle Royale ragwort * ''

Packera ionophylla ''Packera ionophylla'' is an uncommon species of flowering plant in the Asteraceae, aster family known by the common name Tehachapi ragwort. It is Endemism, endemic to California, where it is known from the Tehachapi Mountains, the San Gabriel Mo ...

'' (Greene) W.A. Weber & A. Löve − Tehachapi ragwort * '' Packera layneae'' (Greene) W.A. Weber & A. Löve − Layne's ragwort * '' Packera macounii'' (Greene) W.A. Weber & A. Löve − Siskiyou Mountain ragwort * '' Packera malmstenii'' (Blake ex Tidestrom) Kartesz, comb. nov. ined. − Podunk ragwort * '' Packera millefolia'' (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'' (Rydb.) W.A. Weber & A. Löve − Uinta ragwort * '' Packera moresbiensis'' (Calder & Roy L. Taylor) J.F. Bain – Cleftleaf ragwort * '' Packera multilobata'' (Torr. & Gray ex Gray) W.A. Weber & A. Löve − lobeleaf groundsel ** ''Senecio multilobatus'' Torr. & Gray ex Gray * '' Packera musiniensis'' (S. L. Welsh) Trock * '' Packera neomexicana'' (Gray) W.A. Weber & A. Löve − New Mexico groundsel * '' Packera obovata'' (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'' (Pursh) A.& D. Löve − alpine groundsel * '' Packera paupercula'' (Michx.) A.& D. Löve − balsam groundsel * '' Packera plattensis'' (Nutt.) W.A. Weber & A. Löve − prairie groundsel ** ''Senecio plattensis'' Nutt. * '' Packera porteri'' (Greene) C. Jeffrey − Porter's groundsel * '' Packera pseudaurea'' (Rydb.) W.A. Weber & A. Löve − falsegold groundsel * '' Packera quaerens'' (Greene) W.A. Weber & A. Löve − Mogollon Mountain ragwort ** ''Senecio quaerens'' Greene * '' Packera quercetorum'' (Greene) C. Jeffrey − Oak Creek ragwort * '' Packera sanguisorboides'' (Rydb.) W.A. Weber & A. Löve − burnet ragwort * '' Packera schweinitziana'' (Nutt.) W.A. Weber & A. Löve − Schweinitz's ragwort ** ''Senecio schweinitzianus'' Nutt. * '' Packera serpenticola'' Boufford, Kartesz, S.H. Shi & Renchao Zhou − serpentine ragwort * '' Packera spellenbergii'' (T.M. Barkl.) C. Jeffrey − Carrizo Creek ragwort * '' Packera streptanthifolia'' (Greene) W.A. Weber & A. Löve − Rocky Mountain groundsel * '' Packera subnuda'' (DC.) D.K. Trock & T.M. Barkley – Buek's groundsel * '' Packera tampicana'' (DC.) C. Jeffrey − Great Plains ragwort * '' Packera tomentosa'' (Michx.) C. Jeffrey − woolly ragwort * '' Packera tridenticulata'' (Rydb.) W.A. Weber & A. Löve − threetooth ragwort * '' Packera werneriifolia'' (Gray) W.A. Weber & A. Löve − hoary groundsel Sources: NRCS

References

Asteraceae genera {{Senecioneae-stub