Synonyms: Hieracium arvense (heterotypic); Hieracium spinulosum (heterotypic); Sonchoseris arvensis (heterotypic); Sonchus arvensis var. eglandulosus (heterotypic); Sonchus arvensis var. glandulosus (heterotypic); Sonchus arvensis var. shumovichii (heterotypic); Sonchus arvensis var. vulgaris; Sonchus cumbulus (homotypic); Sonchus glaber (heterotypic); Sonchus glandulosus; Sonchus hantoniensis; Sonchus hispidus; Sonchus intermedius; Sonchus ketzkhovelii (heterotypic); Sonchus laevissimus; Sonchus longifolius (heterotypic); Sonchus maritimus (heterotypic); Sonchus nitidus (heterotypic); Sonchus orixensis; Sonchus repens (homotypic)