Senecio

Senecio (/[invalid input: ‘icon’]s[invalid input: ‘ɨ’]ˈniːʃi.oʊ/)^[1] is a genus of the daisy family (Asteraceae) that includes ragworts and groundsels. The flower heads are normally rayed, completely yellow, and the heads are borne in branched clusters. Senecio is one of the largest genera of flowering plants,^[2] and despite the separation of many species into other genera it still contains Template:Circa species of varied form, including leaf, stem and tuber succulents, annuals, perennials, aquatics, climbers, shrubs and small trees. Some species produce natural biocides (especially alkaloids) to deter or even kill animals that would eat them.

Senecio species are used as food plants by the larvae of some Lepidoptera species — see list of Lepidoptera that feed on Senecio. Pyrrolizidine alkaloids have been found in Senecio nemorensis^[3] and in Senecio cannabifolius var. integrilifolius^[4]

The name means “old man”.

• Senecio ampullaceus — Texas ragwort, Texas squaw-weed, Texas groundsel, clasping-leaf groundsel^[5]
• Senecio angulatus L.f. — Creeping groundsel
• Senecio antisanae
• Senecio arborescens
• Senecio aureus L. — Golden Ragwort^[6]
  • Packera aurea (L.) A. & D. Löve
• Senecio barbertonicus Klatt — Succulent Bush Senecio
• Senecio battiscombei
  • Dendrosenecio battiscombei
• Senecio biglovii – Nodding groundsel
• Senecio brasiliensis (Spreng.) Less. — flor-das-almas
  • Cineraria brasiliensis
• Senecio cambrensis — Welsh groundsel, Welsh ragwort
• Senecio congestus (R. Br.) DC. — Marsh ragwort, Clustered marsh ragwort, Marsh fleabane
  • Cineraria palustris
  • Othonna palustris
  • Tephroseris palustris
• Senecio douglasii – Threadleaf groundsel
• Senecio eboracensis Abbott & Lowe — York groundsel
• Senecio flaccidus Less. — Douglas senecio, threadleaf groundsel, threadleaf ragwort
• Senecio gallicus Chaix — Southern Ragwort
• Senecio glabellus Poir. — Butterweed
  • Packera glabella (Poir) C. Jeffrey
• Senecio glaucus L. — Jaffa groundsel
• Senecio haworthii — Woolly senecio
• Senecio iscoensis — Hieron.
• Senecio jacobaea — Now classed as a separate genus with 29 species.
• Senecio keniensis
  • Dendrosenecio keniensis
• Senecio keniodendron — Giant groundsel
  • Dendrosenecio keniodendron
• Senecio keniophytum
• Senecio kleinia
  • Kleinia neriifolia
• Senecio lamarckianus
• Senecio leucanthemifolius Poir. — Coastal Ragwort
• Senecio littoralis
• Senecio mikanioides — Cape Ivy, German Ivy
  • Delairea odorata
• Senecio obovatus Muhl. — Roundleaf Ragwort
  • Packera obovata (Muhl. ex Willd.)
• Senecio patagonicus
• Senecio pulcher
• Senecio rowleyanus — String of pearls
• Senecio sanmarcosensis
• Senecio scandens — German Ivy^[7]
• Senecio squalidus — Oxford ragwort
• Senecio triangularis – Arrowleaf groundsel
• Senecio vaginatus
• Senecio vernalis — Eastern groundsel
• Senecio viscosus — Sticky ragwort
• Senecio vulgaris — Common groundsel, old-man-in-the-spring

Formerly in Senecio

• Brachyglottis greyi (as S. greyi)
• Florist’s Cineraria, Pericallis × hybrida (as S. cruentus)
• Rugelia nudicaulis — Rugels ragwort

The following genera contain species that are or have been included within Senecio.^[8]

Probable synonyms:

• Antillanthus B. Nord.
• Barkleyanthus H. Rob. & Brettell
• Brachyglottis J. R. Forst. & G. Forst.^[9]
• Canariothamnus B. Nord.
• Dauresia B. Nord. & Pelser
• Dendrophorbium C. Jeffrey
• Dendrosenecio (Hauman ex Hedberg) B. Nord. – Giant groundsels
• Dorobaea Cass.
• Dresslerothamnus H. Rob.
• Elekmania B. Nord.
• Herreranthus B. Nord.
• Hubertia Bory
• Iocenes B. Nord.
• Jacobaea Mill.
• Lasiocephalus Willd. ex Schltdl.
• Leonis B. Nord.
• Lundinia B. Nord.
• Mesogramma DC.
• Monticalia C. Jeffrey
• Nelsonianthus H. Rob. & Brettell
• Nesampelos B. Nord., nom. inval.
• Oldfeltia B. Nord. & Lundin
• Packera Á. Löve & D. Löve
• Pentacalia Cass.
• Pippenalia McVaugh
• Pittocaulon H. Rob. & Brettell
• Pojarkovia Askerova
• Psacaliopsis H. Rob. & Brettell
• Pseudogynoxys (Greenm.) Cabrera
• Pseudojacobaea (Hook. f.) R. Mathur
• Roldana La Llave
• Sinosenecio B. Nord.
• Synotis (C. B. Clarke) C. Jeffrey & Y. L. Chen
• Telanthophora H. Rob. & Brettell
• Tephroseris (Rchb.) Rchb.
• Zemisia B. Nord.^[10]

Ragwort Control Act 2003

Template:Wikispecies Template:Wikiversity-bc Media related to [[commons:Lua error in Module:WikidataIB at line 428: attempt to index field ‘wikibase’ (a nil value).|Lua error in Module:WikidataIB at line 428: attempt to index field ‘wikibase’ (a nil value).]] at Wikimedia Commons

• Natural Resources Conservation Service (NRCS). “PLANTS Profile, Senecio L.” The PLANTS Database. United States Department of Agriculture. Retrieved 2008-03-06.
• Germplasm Resources Information Network (GRIN) (2005-10-26). “Genus: Senecio L.” Taxonomy for Plants. USDA, ARS, National Genetic Resources Program, National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved 2008-03-06.
• Germplasm Resources Information Network (GRIN) (2005-10-26). “GRIN Species Records of Senecio“. Taxonomy for Plants. USDA, ARS, National Genetic Resources Program, National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved 2008-03-06.
• Integrated Taxonomic Information System Organization (ITIS) (20 December 2007). “Senecio L.” Integrated Taxonomic Information System on-line database. Retrieved 2008-02-23.
• Botanic Garden and Botanical Museum Berlin-Dahlem. “Details for: Senecio“. Euro+Med PlantBase. Freie Universität Berlin. Retrieved 2008-03-06.
• Missouri Botanical Garden (1753). “Seneco L.” Tropicos Nomenclatural Data Base. Retrieved 2008-03-27. External link in |work= (help)
• Royal Botanic Garden Edinburgh. “Flora Europaea Search Results”. Retrieved 2008-03-06.
• Flora of Israel Online. “Search Results For ‘senecio‘“. Hebrew University of Jerusalem. Retrieved 2008-03-06.
• Jerusalem Botanical Gardens. “LIST OF ALL PLANTS NAMES -WITH PHOTO S“. Archived from the original on 2007-10-04. Retrieved 2008-03-06.
• Flora of North America. “Family List: 215. Senecio Linnaeus”. 20: 540, 541, 542, 543, 544, 545, 570, 615. Retrieved 2008-03-06.
• Cyrille Chatelain, Laurent Gautier, Raoul Palese. “Senecio L.” African Flowering Plants Database. Conservatoire et Jardin botaniques de la Ville de Genève. Retrieved 2008-03-06.CS1 maint: Multiple names: authors list (link)
• Instituto Darwinion. “Asteraceae” (PDF). Catálogo de las Plantas Vasculares de la República Argentina. II (in Spanish). Universidad de Buenos Aires. p. 255. Retrieved 2008-03-06.CS1 maint: Unrecognized language (link)
• Helen Coleman, FloraBase: Flora of Western Australia (1997-06-18). “search term: Senecio“. Flora Descriptions. Government of Western Australia. Retrieved 2008-03-06.
• Landcare Research. “Senecio L.” Flora of New Zealand: Taxa. Landcare Research Allan Herbarium and New Zealand Plant Names Database. Retrieved 2008-04-01.
• “Search for:genus:Senecio”. Species Information. Calflora — 1700 Shattuck Ave. #198, Berkeley, CA 94709. Retrieved 2008-02-09.
• Flora of Chile. “Volume 4 Asteraceae Senecio L”. 4. Retrieved 2008-03-06.
• Dr. Richard Wunderlin or Dr. Bruce Hansen (2006). “Search Results For Search String: Senecio”. Atlas of Florida Vascular Plants. Institute for Systematic Botany. Retrieved 2008-03-06. External link in |work= (help)
• “Asteraceae”. Primera página de la especie (in Spanish). Malezas de México. Retrieved 2008-03-06.CS1 maint: Unrecognized language (link)
• PlantNET — The Plant Information Network System of Botanic Gardens Trust. “Search terms: Senecio“. Botanic Gardens Trust. Retrieved 2008-03-06. External link in |publisher= (help)
• University of Wisconsin–Stevens Point. “Senecio L.” Robert W. Freckmann Herbarium. Retrieved 2008-03-06.
• Royal Horticultural Society. “RHS PLANT FINDER”. Retrieved 2008-03-06.
• Template:Gutenberg

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