Phaeopappus longispinus Post, Pl. Post. 2: 14. 1891 Phaeopappus longispinus Post, Pl. Post. 2: 14. 1891is basionym for Centaurea longispina (Post) Wagenitz in Bot. Jahrb. Syst. 82: 170. 1963This name is not assigned to any taxon.