Senecio integerrimus (Lambstongue Ragwort) is a species of biennial herb in the family Asteraceae. They have a self-supporting growth form. They are native to Canada and The Contiguous United States. They have simple, broad leaves and yellow flowers. Flowers are visited by Gorgone Checkerspot, Lesser Fritillaries, Arrowhead Blue, and Northern grizzled skipper. Individuals can grow to 0.34 m.
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