[Members of the Sunflower Family with Discoid Flower Heads Found West of the Cascade Mountains of Oregon and Washington]

Butterweeds, Groundsel and Ragworts West of the Cascade Mountains of Oregon and Washington

The Genera Packera and Senecio

Inflorescence of Sweet Marsh Groundsel, Stout Meadow Groundsel, Tall Groundsel: Senecio hydrophiloides (Synonyms: Senecio foetidus, Senecio foetidus var. foetidus, Senecio foetidus var. hydrophiloides, Senecio oreganus)

Sweet Marsh Butterweed: Senecio hydrophiloides

Elegant Groundsel, Rayless Mountain Butterweed: Packera indecora (Synonym: Senecio indecorus) -

Rayless Alpine Butterweed, Rayless Alpine Groundsel: Packera pauciflora (Synonym: Senecio pauciflorus) -

Rayless Groundsel, Rayless Ragwort: Senecio aronicoides -

Stout Meadow Groundsel, Sweet Marsh Butterweed: Senecio hydrophiloides (Synonyms: Senecio foetidus, Senecio foetidus var. foetidus, Senecio foetidus var. hydrophiloides, Senecio oreganus) - Rays few in number. Flower heads may appear rayless.

Alkali Marsh Butterweed, Alkali Marsh Ragwort, Water Groundsel, Water Ragwort: Senecio hydrophilus (Synonym: Senecio hydrophilus var. pacifica) - Rays few in number. Flower heads may appear rayless.

Wood Groundsel, Woodland Groundsel, Woodland Ragwort: Senecio sylvaticus - Rays few in number. Flower heads may appear rayless.

Common Groundsel, Old Man-in-the-Spring: Senecio vulgaris -

Paul Slichter E-mail