Ragwort

Packera is a genus of about 75 species of plants in the daisy family, Asteraceae.^[1] 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.^[2]

Packera hesperia

Packera sanguisorbae

Species

As of March 2023, Plants of the World Online accepted the following species.^[1] English names are based on the PLANTS database.^[3]

• 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^[4]
• 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