Packera macounii

From Puget Prairie Plants
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  • Latin Name: Packera macounii
  • Family: Asteraceae
  • Common name: Puget butterweed, long rayed groundsel, Macoun's groundsel, Siskiyou Mountain ragwort
  • Synonyms/Misapplications: Senecio macounii
  • Codon: PACMAC

Packera macounii

"Packera macounii is a species of flowering plant in the aster family known by the common name Siskiyou Montain ragwort. It is native to the west coast of North America from British Columbia to far northern California, where it grows in chaparral and mountain forests, often on serpentine soils. It is a perennial herb producing a single erect stem up to 40 or 50 centimeters in maximum height from a taproot and branching caudex unit. It is slightly hairy to quite woolly in texture. The leaves have lance-shaped blades several centimeters long which are borne on long petioles. The inflorescence holds several flower heads containing many disc florets and usually either 8 or 13 yellow ray florets each about a centimeter long." [1]


Packera macounii (Greene) W.A. Weber & Á. Löve

Synonyms: Senecio ligulifolius Greene, Senecio macounii Greene




Flowers & Bloom Period

Herbarium specimen of Siskiyou mountain ragweed from Jepson Herbarium



Seeds of Siskiyou Mountain ragweed

Photo by Lisa Hintz


  • United States:
  • Elsewhere:




Photo Gallery


  1. Wikipedia Foundation

External Links

Siskiyou Mountain ragwort USDA Plants Database page

Integrated Taxonomic Information System

Jepson Manual Treatment