White Hawkweed, White-flowered Hawkweed: Hieracium albiflorum (Synonyms: Chlorocrepis albiflora, Hieracium helleri, Hieracium occidentale, Hieracium siskiyouense)
Devil's Paintbrush, King Devil, Orange Hawkweed: Hieracium aurantiacum
Bolander's Hawkweed: Hieracium bolanderi
Meadow Hawkweed, Yellow King Devil: Hieracium caespitosum (Synonym: Hieracium pratense)
Flowery Hawkweed: Hieracium xfloribundum
Greene's Hawkweed: Hieracium greenei
Prickly Hawkweed, Shaggy Hawkweed: Hieracium horridum
Common Hawkweed, English Hawkweed, European Hawkweed, Lachenal's Hawkweed: Hieracium lachenalii (Synonyms: Hieracium acuminatum, Hieracium vulgatum)
Longbeard Hawkweed, Long-bearded Hawkweed: Hieracium longiberbe
Wall Hawkweed: Hieracium murorum
Parry's Hawkweed: Hieracium parryi (Synonym: Hieracium scouleri var. nudicaule)
Mouse-ear Hawkweed: Hieracium pilosella (Synonyms: Hieracium pilosella var. nivea, Hieracium pilosella var. pilosella, Pilosella officinarum)
Tall Hawkweed: Hieracium piloselloides (Synonym: Hieracium florentinum)
Savoy Hawkweed: Hieracium sabaudum
Houndstongue Hawkweed, Hound Tongue Hawkweed, Scouler's Hawkweed, Scouler's Woollyweed: Hieracium scouleri (Synonyms: Hieracium albertinum, Hieracium chapacanum, Hieracium cusickii, Hieracium cynoglossoides, Hieracium cynoglossoides var. nudicaule, Hieracium flettii, Hieracium nudicaule, Hieracium scouleri var. albertinum, Hieracium scouleri var. griseum, Hieracium scouleri var. scouleri)
Forked Hawkweed: Hieracium xstoloniflorum (Synonyms: Hieracium xstoloniflorum var. cayouetteanum, Hieracium xstoloniflorum var. laurentianum, Hieracium xstoloniflorum var. stoloniflorum)
Alpine Hawkweed, Low Alpine Hawkweed, Slender Hawkweed: Hieracium triste (Synonyms: Chlorocrepis tristis ssp. gracilis, Hieracium gracile, Hieracium gracile var. densifloccosum, Hieracium gracile var. detonsum, Hieracium gracile var. gracile, Hieracium triste ssp. gracile, Hieracium triste var. gracile)
Narrowleaf Hawkweed, Umbellate Hawkweed: Hieracium umbellatum (Synonyms: Hieracium columbianum, Hieracium scabriusculum, Hieracium scabriusculum var. columbianum, Hieracium scabriusculum var. perhirsutum, Hieracium scabriusculum var. saximontanum, Hieracium scabriusculum var. scabrum, Hieracium umbellatum ssp. umbellatum)