Hieracium scouleri

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  • Scientific Name: Hieracium scouleri
  • Family: Asteraceae
  • Common Names: hound tongue hawkweed, Scouler's hawkweed, woolly weed
  • Synonyms/Misapplications: Hieracium albertinum, Hieracium chapacanum, Hieracium cusickii, Hieracium cynoglossoides
  • Codon: HIESCO

Photo by Stevens Co. Noxious Weed Control Board, also featured on Main Page


Scientific classification
Kingdom: Plantae
Subkingdom: Viridiplantae
Phylum: Tracheophyta
Subphylum: Spermatophytina
Class: Magnoliopsida
Subclass: Asteranae
Order: Asterales
Family: Asteraceae
Genus: Hieracium L.
Species: Hieracium scouleri Hook.
  • Hieracium albertinum Farr
  • Hieracium chapacanum Zahn
  • Hieracium cusickii Gandog.
  • Hieracium cynoglossoides Arv.-Touv.
  • Hieracium flettii H. St. John & Warren
  • Hieracium scouleri var. scouleri Hook.
  • Hieracium scouleri var. albertinum (Farr) G.W. Douglas & G.A. Allen
  • Hieracium scouleri var. griseum (Rydb.) A. Nelson



Native rhizomatous perennial, stem ranging from nearly glabrous to densely wooly-hairy, stem producing a milky juice.[2][3]

Leaves are elliptical, winged petioles towards base, becoming smaller and sessile up the stem.[4] Leaves are generally hairy on both sides, with long, smooth, or barbellate hairs, not glandular, if leaves are subglabular (almost hairless), then the midveins and margins often have short-glandular hairs, leaves tufted at base during anthesis.[3]

Inflorescence consists of yellow ray florets, subtended by an involucre of overlapping gland tipped bracts.[5] Receptacle naked.[3]

Fruit is a ribbed achene, ~3mm. long, pappus whitish or tawny.[6]

Genus comes from Greek hierax, hawk.[3]

Bloom Period



Central BC to northern California, east to Alberta, Montana and Utah.[3]


Forest, meadows, prairies, rocky slopes, stream banks, roadsides, thickets.[3]


Sx̌ʷyʔiɬpx use of infusion of leaves and roots, taken as a general tonic.[7]


See White, Chris, 'Plant Propagation Protocol for Hieracium scouleri' Available at http://courses.washington.edu/esrm412/protocols/protocols_files/forbs_III.htm for propagation information.

Photo Gallery


  1. Integrated Taxonomic Information System. Retrieved from https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=37728
  2. David J. Keil 2012, Hieracium scouleri, in Jepson Flora Project (eds.) Jepson eFlora, /eflora/eflora_display.php?tid=3542, accessed on June 10, 2020.
  3. 3.0 3.1 3.2 3.3 3.4 3.5 Hitchcock, C. L., Cronquist, A., Giblin, D., & Legler, B. et al. (2018). Flora of the Pacific Northwest: an illustrated manual. Seattle: University of Washington Press.
  4. 4.0 4.1 WTU Herbarium, Burke Museum, & University of Washington. Retrieved from https://biology.burke.washington.edu/herbarium/imagecollection/taxon.php?Taxon=Hieracium%20scouleri
  5. Bowcutt, F., & Hamman, Sarah. (2016). Vascular plants of the South Sound prairies (First ed.). Olympia, Washington: The Evergreen State College Press.
  6. Klinkenberg, Brian. (Editor) 2020. E-Flora BC: Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver. [Accessed:2020-06-10 1:03:07 PM]
  7. Turner, Nancy J., R. Bouchard and Dorothy I.D. Kennedy, 1980, Ethnobotany of the Okanagan-Colville Indians of British Columbia and Washington, Victoria. British Columbia Provincial Museum, page 84. Retrieved from http://naeb.brit.org/uses/search/?string=hieracium+scouleri