caltha

caltha, ae, f. (calthum, i, n., Prud. Cath. 5, 114) [cf. Gr. χάλκανθος],

a strongsmelling yellow flower , prob. our pot marigold : Calendula officinalis, Linn.; Plin. 21, 6, 15, § 28; Verg. E. 2, 50; Col. 10, 97; 10, 310.