Ragworts : Senecio rockymountainsflora.com

Wildflower Search wildflowersearch.org

FNA: Senecio actinella nwwildflowers.com

Open Herbarium - Senecio openherbarium.org

CoTRAM - Senecio cotram.org

2013 BONAP North American... bonap.net

SEINet Portal Network -... swbiodiversity.org

Senecio -- Discover Life... www.discoverlife.org

Great Plains Herbaria -... www.ngpherbaria.org

CoTRAM - Senecio cotram.org

2013 BONAP North American... bonap.net

Senecio actinella Greene |... powo.science.kew.org

groundsels (Genus Senecio)... www.inaturalist.org

Senecio actinella |... wildflowersearch.org

Open Herbarium - Senecio openherbarium.org

SEINet Portal Network -... swbiodiversity.org

University of Colorado... botanydb.colorado.edu

Red de Herbarios Mexicanos... herbanwmex.net

Great Plains Herbaria -... www.ngpherbaria.org