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, Senecio ligulifolius
  • Codon: PACMAC

Taxonomy

Packera macounii
Scientific classification
Kingdom: Plantae
Subkingdom: Tracheobionta
Phylum: Spermatophyta
Subphylum: Magnoliophyta
Class: Magnoliopsida
Subclass: Asteranae
Order: Asterales
Family: Asteraceae
Genus: Packera Á. Löve & D. Löve
Species: Packera macounii (Greene) W.A. Weber & Á. Löve

Description

Perennial herb, rising from fibrous roots or horizontal rhizomes, variable hairiness from nearly glabrous to wooly-hairy.

Basal leaves thick, lanceolate stalked, 4-27 cm long including the stalk, sparcely white-woolly when young becoming hairless by flowering time, variable margins- from entire to coarsely toothed. Cauline leaves similar, from lanceolate to linear, reduced upwards, becoming sessile up the stalk. Tomentum more dense on lower leaf surfaces.

Infolorescense


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Distribution


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Photo Gallery


References



External Links


Siskiyou Mountain ragwort USDA Plants Database page

Integrated Taxonomic Information System

Jepson Manual Treatment