Hieracium umbellatum

Hieracium umbellatum (commonly called Hieracium canadense), the Canadian hawkweed, Canada hawkweed, narrowleaf hawkweed, or northern hawkweed, is a flowering plant in the family Asteraceae.

Hieracium umbellatum
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
Genus:	Hieracium
Species:	H. umbellatum
Binomial name
Hieracium umbellatum L.
Global country-level distribution
Synonyms[1]
Hieracium vulgatum Hieracium kalmii L. Hieracium umbellatum L. Hieracium scabriusculum Schwein. Hieracium acranthophorum Omang Hieracium columbianum Rydb. Hieracium devoldii Omang Hieracium x dutillyanum Lepage Hieracium eugenii Omang Hieracium fasciculatum Pursh Hieracium macrophyllum Pursh Hieracium manitobense Gand. Hieracium musartutense Omang Hieracium nepiocratum Omang Hieracium oxoacrum Gand. Hieracium prenanthoides Hook., non Vill. Hieracium rigorosum (Laest.) Almq. Hieracium sinense Vaniot Hieracium stiptocaule Omang[2] Hieracium lactescens Rouy[3] Hieracium dunale Hieracium hispidum Forssk. Hieracium monticola Jord. Hieracium pervagum Boreau[4]

Distribution

It is native to most of the temperate parts of the northern hemisphere.^[5]

• 
  Range of Hieracium canadense throughout Asia
• 
  Range of Hieracium canadense throughout Europe
• 
  Range of Hieracium canadense throughout North America

Description

Its pointed leaves have toothed margins, where the teeth can appear almost hooked. The flowers of the plant are yellow.

• 
  Mature plant
• 
  Budding, flowering, and fruiting
• 
  Zygaena moth visiting the flower

Infraspecific synonyms

Male leafcutter bee on the flower

There are many named infraspecific taxa of Hieracium umbellatum:

• Hieracium canadense Michx. forma lepagei Vict.
• Hieracium canadense Michx. forma pilosius Lepage
• Hieracium canadense Michx. forma rufescens Lepage
• Hieracium canadense Michx. var. angustifolium Torr. & A.Gray p.p.
• Hieracium canadense Michx. var. columbianum (Rydb.) H. St.John
• Hieracium canadense Michx. var. divaricatum Lepage
• Hieracium canadense Michx. var. fasciculatum (Pursh) Fernald
• Hieracium canadense Michx. var. hirtirameum Fernald
• Hieracium canadense Michx. var. kalmii (L.) Scoggan
• Hieracium canadense Michx. var. latifolium Torr. & A.Gray
• Hieracium canadense Michx. var. scabrum Schwein.
• Hieracium canadense Michx. var. subintegrum Lepage
• Hieracium kalmii L. var. canadense (Michx.) Reveal
• Hieracium kalmii L. var. fasciculatum (Pursh) Lepage
• Hieracium kalmii L. var. subintegrum (Lepage) Lepage
• Hieracium scabriusculum Schwein. forma chrysostylum Lepage
• Hieracium scabriusculum Schwein. forma phaeostylum Lepage
• Hieracium scabriusculum Schwein. forma xanthostylum Lepage
• Hieracium scabriusculum Schwein. var. columbianum (Rydb.) Lepage
• Hieracium scabriusculum Schwein. var. perhirsutum Lepage
• Hieracium scabriusculum Schwein. var. saximontanum Lepage
• Hieracium scabriusculum Schwein. var. scabrum (Schwein.) Lepage
• Hieracium subnudum L. var. canadense (Michx.)(Michx.) DC.
• Hieracium sylvaticum Salisb., nom. illeg. hom., non (L.) L.
• Hieracium umbellatum L. subsp. canadense (Michx.) Guppy
• Hieracium umbellatum L. subsp. scabriusculum (Schwein.) Á. & D. Löve
• Hieracium umbellatum L. var. canadense (Michx.) Breitung
• Hieracium umbellatum L. var. commune Fr.
• Hieracium umbellatum L. var. coronopifolium Bernh. ex Kom.
• Hieracium umbellatum L. var. mongolicum Fr.
• Hieracium umbellatum L. var. scabriusculum (Schwein.) Farw.^[2]
• Hieracium laevigatum subsp. canadense (Michx.) Zahn
• Hieracium umbellatum L. var. canadense (Michx.) Breitung^[6]
• Hieracium canadense Michx. var. canadense
• Hieracium canadense Michx. var. fasciculatum (Pursh) Fernald
• Hieracium scabriusculum Schwein. var. columbianum (Rydb.) Lepage^[7]
• Hieracium umbellatum subsp. monticola (Jord.) Nyman^[4]