Packera

Packera is a genus of about 75 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 by Asa Gray), but were moved to a different genus based on chromosome numbers, a variety of morphological characters, and molecular phylogenetic evidence.

Species
, Plants of the World Online accepted the following species. English names are based on the PLANTS database.
 Packera actinella (Greene) W.A.Weber & Á.Löve – flagstaff ragwort
 Packera anonyma (Alph.Wood) W.A.Weber & A.Löve − Small's ragwort
 Packera antennariifolia (Britton) W.A.Weber & A.Löve − shalebarren ragwort
 Packera aurea (L.) Á.Löve & D.Löve (syn. Senecio aureus) − golden ragwort
 Packera bellidifolia (Kunth) W.A.Weber & Á.Löve
 Packera bernardina (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 (syn. Senecio breweri) − Brewer's ragwort
 Packera cana (Hook.) W.A.Weber & A.Löve − woolly groundsel
 Packera candidissima (Greene) W.A.Weber & Á.Löve
 Packera cardamine (Greene) W.A.Weber & A.Löve − bittercress ragwort
 Packera castoreus (S.L.Welsh) Kartesz − Beaver Mountain ragwort
 Packera clevelandii (Greene) W.A.Weber & A.Löve (syn. Senecio clevelandii) − Cleveland's ragwort
 Packera coahuilensis (Greenm.) C.Jeffrey
 Packera contermina (Greenm.) J.F.Bain
 Packera crawfordii (Britton) A.M.Mahoney & R.R.Kowal 
 Packera crocata (Rydb.) W.A.Weber & A.Löve − saffron ragwort
 Packera cymbalaria (Pursh) W.A.Weber & A.Löve − dwarf arctic ragwort
 Packera cynthioides (Greene) W.A.Weber & A.Löve (syn. Senecio cynthiodes) − White Mountain ragwort
 Packera debilis (Nutt.) W.A.Weber & A.Löve − weak groundsel
 Packera dimorphophylla (Greene) W.A.Weber & A.Löve − splitleaf groundsel
 Packera dubia (Spreng.) Trock & Mabb. (syn. Packera tomentosa) − woolly ragwort
 Packera eurycephala (Torr. & A.Gray) W.A.Weber & A.Löve − widehead groundsel
 Packera fendleri (Gray) W.A.Weber & A.Löve − Fendler's ragwort
 Packera flettii (Wiegand) W.A.Weber & A.Löve − Flett's ragwort
 Packera franciscana (Greene) W.A.Weber & A.Löve (syn. Senecio franciscanus) − San Francisco Peaks ragwort
 Packera ganderi (T.M.Barkley & R.M.Beauch.) W.A.Weber & Á.Löve − Gander's ragwort
 Packera glabella (Poir) C.Jeffrey (syn. Senecio glabellus) − butterweed
 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 heterophylla (Fisch.) E.Wiebe
 Packera hintoniorum (B.L.Turner) C.Jeffrey
 Packera hyperborealis (Greenm.) Á.Löve & D.Löve − northern groundsel
 Packera indecora (Greene) Á.Löve & 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 loratifolia (Greenm.) W.A.Weber & Á.Löve
 Packera macounii (Greene) W.A.Weber & A.Löve − Siskiyou Mountain ragwort
 Packera malmstenii (S.F.Blake ex Tidestr.) Kartesz − Podunk ragwort
 Packera mancosiana Yeatts, B.Schneid. & Al Schneid. 
 Packera × memmingeri (Britton ex Small) Weakley
 Packera millefolium (Torr. & A.Gray) W.A.Weber & Á.Löve (syn. Senecio millefolium) − piedmont ragwort
 Packera millelobata (Rydb.) W.A.Weber & A.Löve − Uinta ragwort
 Packera montereyana (S.Watson) C.Jeffrey
 Packera moranii (T.M.Barkley) C.Jeffrey
 Packera multilobata (Torr. & A.Gray) W.A.Weber & Á.Löve − lobeleaf groundsel
 Packera musiniensis (S.L.Welsh) Trock
 Packera neomexicana (A.Gray) W.A.Weber & A.Löve − New Mexico groundsel
 Packera obovata (Willd.) W.A.Weber & A.Löve (syn. Senecio obovatus) − roundleaf ragwort
 Packera ogotorukensis (Packer) Á.Löve & D.Löve − Ogotoruk Creek ragwort
 Packera pauciflora (Pursh) Á.Löve & D.Löve − alpine groundsel
 Packera paupercula (Michx.) Á.Löve & D.Löve − balsam groundsel
 Packera plattensis (Nutt.) W.A.Weber & A.Löve (syn. Senecio plattensis) − prairie groundsel
 Packera porteri (Greene) C.Jeffrey − Porter's groundsel
 Packera pseudaurea (Rydb.) W.A.Weber & A.Löve − falsegold groundsel
 Packera quebradensis (Greenm.) W.A.Weber & Á.Löve 
 Packera quercetorum (Greene) C.Jeffrey − Oak Creek ragwort
 Packera rosei (Greenm.) W.A.Weber & Á.Löve
 Packera sanguisorbae (DC.) C.Jeffrey
 Packera sanguisorboides (Rydb.) W.A.Weber & A.Löve − burnet ragwort
 Packera scalaris (Greene) C.Jeffrey 
 Packera schweinitziana (Nutt.) W.A.Weber & A.Löve (syn. Senecio schweinitzianus) − Schweinitz's ragwort
 Packera serpenticola Boufford, Kartesz, S.H.Shi & R.Zhou − serpentine ragwort 
 Packera spellenbergii (T.M.Barkley) C.Jeffrey − Carrizo Creek ragwort
 Packera streptanthifolia (Greene) W.A.Weber & A.Löve − Rocky Mountain groundsel 
 Packera subnuda (DC.) Trock & T.M.Barkley – Buek's groundsel
 Packera tampicana (DC.) C.Jeffrey − Great Plains ragwort
 Packera texensis O'Kennon & Trock
 Packera thurberi (A.Gray) B.L.Turner
 Packera toluccana (DC.) W.A.Weber & Á.Löve
 Packera umbraculifera (S.Watson) W.A.Weber & Á.Löve
 Packera werneriifolia (A.Gray) W.A.Weber & A.Löve − hoary groundsel
 Packera zimapanica (Hemsl.) C.C.Freeman & T.M.Barkley

References

 
Asteraceae genera