Butterweeds, Groundsels and Ragworts with Discoid Flower Heads (lacking ray flowers)
Bolander's Groundsel, Bolander's Ragwort: Packera bolanderi var. bolanderi (Synonym: Senecio bolanderi var. bolanderi) -
Harford's Groundsel, Harford's Ragwort: Packera bolanderi var. harfordii (Synonyms: Senecio bolanderi var. harfordii, Senecio harfordii) -
Tall Butterweed, Woolly Butterweed, Woolly Groundsel: Packera cana (Synonyms: Senecio canus, Senecio howellii, Senecio purshianus) -
Flett's Groundsel, Flett's Ragwort: Packera flettii (Synonym: Senecio flettii) -
Siskiyou Butterweed, Serpentine Groundsel, Western Ragwort: Packera hesperia (Synonym: Senecio hesperius) -
Elegant Groundsel, Rayless Mountain Butterweed: Packera indecora (Synonym: Senecio indecorus) -
Long-rayed Groundsel, Macoun's Groundsel, Puget Butterweed, Siskiyou Mountain Ragwort, Siskiyou Mountains Ragwort: Packera macounii (Synonyms: Senecio fastigatus, Senecio macounii) -
Alpine Groundsel, Rayless Alpine Butterweed, Rayless Groundsel: Packera pauciflora (Synonym: Senecio pauciflorus) - Discoid flower heads lack ray flowers. Disk flowers orange to red.
Falsegold Groundsel, Streambank Butterweed: Packera pseudaurea var. pseudaurea (Synonyms: Senecio pseudaureus ssp. pseudaureus, Senecio pseudarueus var. pseudaureus) -
Cleftleaf Groundsel, Rocky Mountain Butterweed, Rocky Mountain Groundsel: Packera streptanthifolia (Synonym: Packer streptanthifolia var. streptanthifolia, Senecio cymbalarioides, Senecio cymbalarioides var. suksdorfii, Senecio leonardii, Senecio streptanthifolius, Senecio streptanthifolius var. laetiflorus, Senecio streptanthifolius var. wallowensis) -