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Hieracium Linnaeus. Hawkweed, King-devil.

Key to Hieracium

A genus of 250-1000 species, herbs, primarily temperate. Hieracium is a complicated genus, with many apomictic races sometimes recognized as taxa. Often separated into Hieracium and Pilosella, an approach increasingly supported by molecular and morphological evidence, and has become the dominant approach in Europe and worldwide (Funk et al. 2009; Kilian, Gemeinholzer, & Lack 2009; Bräutigam & Greuter 2007).

Key advice:Many of our species hybridize, and some of the species here recognized are apparently hybrid derivatives. We prefer to treat taxa such as H. marianum as species (even if hybridization-derived) because they regularly occur independently of the parental taxa. Other hybrids of native species known in our area include: H. gronovii × paniculatum [H. ×alleghaniense Britton (pro sp.)], H. gronovii × venosum, H. paniculatum × scabrum, H. paniculatum × venosum [H. ×scribneri Small (pro sp.); H. scribneri – K1], H. scabrum × venosum.

Ref: Bräutigam & Greuter (2007); Cronquist (1980); Funk et al. (2009); Kilian, Gemeinholzer, & Lack (2009); Strother (2006t) In Flora of North America Editorial Committee (2006a). Show full citations.

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Hover over a shape, letter, icon, or arrow on the map for definition or see the legend. Data for arrows not developed for genera and families which may have species only occurring outside the flora area.

image of plant© Gary P. Fleming | Hieracium venosum | Original Image ⭷
image of plant© Gary P. Fleming | Hieracium paniculatum | Original Image ⭷
image of plant© Richard & Teresa Ware | Hieracium venosum CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Gary P. Fleming | Hieracium venosum | Original Image ⭷
image of plant© Gary P. Fleming | Hieracium gronovii | Original Image ⭷

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See something wrong or missing on about Hieracium? Let us know here: (Please include your name and email if at all complicated so we can clarify if needed.) We greatly appreciate feedback, and will include updates from you in our next webapp update, which can take a few months.