; Sp. Pl. 2: 909 (1753)
Distribution: mostly Europe, Mediterranean and W-Asia, few E-Asia, trop. Africa. Circumscription of species (vs. subspecies) is fairly controversial. Separation of Cyanus as genus is not accepted by Kubitzki (Vol. VIII). Hyalaea might deserve separate genus status.
= Acosta Adans., Fam. 2: 117 (1763)
= Acrocentron Cass., Dict. Sc. Nat. 44: 37. (1826)
= Acrolophus Cass., Dict. Sc. Nat. I. 253 (1827)
= Alophium Cass., Dict. Sc. Nat. 54: 493 (1828)
= Ammocyanus (Boiss.) Dostál, Acta Bot. Acad. Sci. Hung., 19(1 -4): 78 (1973)
= Antaurea Neck., Elem. 1: 70 (1790)
= Benedicta Bernh., Syst. Verz. Erf. 108 (1810)
= Calcitrapa Heist. ex Fabr., Enum. Meth. Pl. 94 (1759)
= Calcitrapoides Fabr., Enum. Meth. Pl. 94 (1759)
= Carbeni Adans., Fam. Pl. 2: 116, 532 (1763)
= Cardosanctus Bubani, Fl. Pyrenees 2: 152 (1900)
= Cestrinus Cass., Dict. Sc. Nat. 8: 24 (1817)
= Chartolepis Cass., Dict. Sc. Nat. 44: 36 (1826)
= Cheirolepis Boiss., Diagn. Ser. I. 10: 106 (1849)
= Chryseis Cass., Dict. Sc. Nat. 7: 377, 9: 154 (1817)
= Chrysopappus Takht., Not. Syst. Herb. Inst. Bot. Acad. Sci. URSS, 7: 275 (1938)
= Cistrum Hill, Veg. Syst. 4: 36 (1762)
= Cnicus Gaertn., Fruct. 2: 385. t. 162 (1791)
= Colymbada Hill, Veg. Syst. 4: 31 (1762)
= Crepula Hill, Veg. Syst. 4: 9 (1762)
= Cyanus Mill., Gard. Dict. Abridg. Ed. 4 (1754)
= Cynaroides (Boiss. ex Walp.) Dostál, Acta Bot. Acad. Sci. Hung., 19(1-4): 77 (1973)
= Eremopappus Takht., Proc. Acad. Sci. Armen. SSR, 2: No. 1, 25 (1945), reimpr.
= Erinacella Rech.fil.) Dostál, Acta Bot. Acad. Sci. Hung., 19(1-4): 77 (1973)
= Eriopha Hill, Veg. Syst. 4: 47 (1762)
= Grossheimia Sosn. & Takht., Proc. Acad. Sci. Armen. SSR, 3: No. 1, 22 (1945)
= Halocharis M.Bieb. ex DC., Prod. 6: 665 (1837)
= Heraclea Hill, Veg. Syst. 4: 37 (1762)
= Hierapicra Siegesb. ex Kuntze, Revis. Gen. 346 (1891)
= Hippophaestum Gray, Nat. Arr. Brit. Pl. 2: 443 (1821)
= Hookia Neck., Elem. 1: 70 (1790)
= Hyalea (DC.) Jaub. & Spach, Illustr. 3: 19. t. 214-217, 292 (1847)
= Hymenocentron Cass., Dict. Sc. Nat. 44: 37 (1826)
= Jacea Mill., Gard. Dict. Abridg. Ed. 4 (1754)
= Lepteranthus Neck., Elem. 1: 73 (1790)
= Leucantha Gray, Nat. Arr. Brit. Pl. 2: 443 (1821)
= Lopholoma Cass., Dict. Sc. Nat. 44: 37 (1826)
= Malacocephalus Tausch, Flora, 11: (1828) II. 481
= Melanoloma Cass., Dict. Sc. Nat. 29: 472 (1823)
= Menomphalus Pomel, Nouv. Mat. Fl. Atl. 32 (1874)
= Mesocentron Cass., Dict. Sc. Nat. 44: 38 (1826)
= Microlophus Cass., Dict. Sc. Nat. 44: 37 (1826)
= Pachycentron Pomel, Nouv. Mat. Fl. Atl. 32 (1874)
= Pectinastrum Cass., Dict. Sc. Nat. 44: 38 (1826)
= Petrodavisia Holub, Folia Geobot. Phytotax., 10(2): 193 (1975)
= Phaeopappus Boiss., Diagn. Ser. I. 6: 122 (1845)
= Phalolepis Cass., Dict. Sc. Nat. 50: 248 (1828)
= Philostizus Cass., Dict. Sc. Nat. 39: 498 (1826)
= Phrygia Gray, Nat. Arr. Brit. Pl. 2: 441 (1821)
= Piptoceras Cass., Dict. Sc. Nat. 1: 469 (1828)
= Platylophus Cass., Dict. Sc. Nat. 44: 36 (1826)
= Plumosipappus Czerep., Not. Syst. Herb. Inst. Bot. Acad. Sci. URSS, 20: 457 (1960)
= Podia Neck., Elem. 1: 72 (1790)
= Polyacantha Gray, Nat. Arr. Brit. Pl. 2: 443 (1821)
= Psora Hill, Veg. Syst. 4: 30 (1762)
= Pterolophus Cass., Dict. Sc. Nat. 44: 34 (1826)
= Ptosimopappus Boiss., Voy. Bot. Espagne, 2: 739 (1845)
= Pycnocomus Hill, Veg. Syst. 4: 38 (1762)
= Sagmen Hill, Veg. Syst. 4: 35 (1762)
= Seridia Juss., Gen. 173 (1789)
= Setachna Dulac, Fl. Hautes-Pyr. 518 (1867)
= Solstitiaria Hill, Veg. Syst. 4: 21 (1762)
= Sphaerocephala Hill, Veg. Syst. 4: 48 (1762)
= Spilacron Cass., Dict. Sc. Nat. 50: 238 (1827)
= Staebe Hill, Veg. Syst. 3: 145 (1761), 4: 33 (1762)
= Stenolophus Cass., Dict. Sc. Nat. 44: 35 (1826), 50: 499 (1827)
= Stephanochilus Coss. & Durieu ex Benth. & Hook.fil., Gen. 2: 477 (1873)
= Tetramorphaea DC., Guill. Arch. Bot. 2: 331 (1833)
= Tomanthea DC., Prod. 5I. 564 (1837)
= Triplocentron Cass., Dict. Sc. Nat. 44: 38 (1826)
= Veltis Adans., Fam. 2: 116 (1763) 2: 116 (1763)
= Verutina Cass., Dict. Sc. Nat. 44: 38 (1826), 58: 8 (1829)
= Wagenitzia Dostál, Acta Bot. Acad. Sci. Hung., 19(1-4): 76 (1973)