Contains 4 accepted taxa overall.

Characteristics
Hypochaeris L.
CATSEAR
Classification
ASTERALES
Hypochaeris
Citation
HYPOCHAERIS Linnaeus, Sp. Pl. 810. 1753.
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TYPE: Hypochaeris glabra Linnaeus Lectotypified by Britton & A. Brown, Ill. Fl. N. U.S., ed. 2. 3: 309. 1913.
Species
Scientific Name Common Name Herbarium Specimens Status Photos
Hypochaeris chillensis SOUTH AMERICAN CATSEAR; TWEEDIE'S CATSEAR Not Native
Hypochaeris glabra SMOOTH CATSEAR Not Native
Hypochaeris microcephala var. albiflora SMALLHEAD CAT'S EAR Not Native
Hypochaeris radicata HAIRY CATSEAR Not Native UPL (NWPL)
[Family identification key]
1.  Leaves basal and some smaller ones cauline; pappus bristles in 1 series, all plumose
2
1.  Leaves all basal, cauline absent or nearly so; pappus bristles in 2 series, the outer barbellate, the inner plumose and longer
3
2.  Involucres broadly campanulate; phyllaries hirsute medially; corollas yellow
2.  Involucres cylindric or narrowly campanulate; phyllaries glabrous to sparsely tomentulose; corollas white
3.  Annuals; leaves glabrous or sometimes hirsute on veins; florets subequal to phyllaries at flowering; cypselae dimorphic, outer truncate or with a short beak, inner with longer beaks
3.  Perennials; leaves hirsute; florets surpassing phyllaries at flowering; cypselae monomorphic, all beaked
Genus Synonyms
Synonym Full Citation Basionym Type
Achyrophorus Achyrophorus Adanson, Fam. Pl. 1: 112, 512. 1763. TYPE: = Hypochaeris Linnaeus 1753.
Agenora Agenora D. Don, Edinburgh New Philos. J. 6: 310. 1829. TYPE: Seriola laevigata Linnaeus = Seriola Linnaeus 1763, by lectotypification.
Arachnopogon Arachnopogon Berg ex Haberle, Cat. Pesth. 1832. TYPE: Non designatus.
Cycnoseris Cycnoseris Endlicher, Bot. Zeitung (Berlin) 1: 458. 1843. TYPE: Cycnoseris australis Endlicher
Fabera Fabera Schultz Bipontinus, Nov. Actorum Acad. Caes. Leop.-Carol. Nat. Cur. 21: 129. 1845. TYPE: Non designatus.
Metabasis Metabasis de Candolle, Prodr. 7: 97, 307. 1838. TYPE: Non designatus.
Oreophila Oerophila D. Don, Trans. Linn. Soc. London 16: 178. 1830. TYPE: Oreophila sessiliflora (Kunth) D. Don (Hypochaeris sessiliflora Kunth)
Piptopogon Piptopogon Cassini, in Cuvier, Dict. Sci. Nat. 48: 507. 1827. TYPE: Piptopogon decipiens Cassini, nom. illegit. (Seriola laevigata Linnaeus; Piptopogon laevigatus (Linnaeus) Schultz Bipontinus) = Seriola Linnaeus 1763, by lectotypification.
Porcellites Porcellites Cassini, in Cuvier, Dict. Sci. Nat. 43: 42. 1826. TYPE: Porcellites radicatus (Linnaeus) Cassini (Hypochaeris radicata Linnaeus)
Robertia Robertia Richard ex de Candolle & Lamarck, Fl. Franc. 6: 453. 1815, non Scopoli 1777, nec Merat de Vaumartoise 1812. TYPE: Robertia taraxacoides (Loiseleur des Longchamps) de Candolle (Seriola taraxacoides Loiseleur des Longchamps)
Seriola Seriola Linnaeus, Sp. Pl., ed. 2. 1139. 1763. TYPE: Seriola laevigata Linnaeus Lectotypified by Steudel, Nomencl. Bot., ed. 2. 2: 568. 1841.
Trommsdorffia Trommsdorffia Bernhardi, Syst. Verz. Pfl. 102. 1800. TYPE: Trommsdorffia maculata (Linnaeus) Bernhardi (Hypochaeris maculata Linnaeus)