Synonyms: Caltha arctica; Caltha arctica arctica; Caltha arctica caespitosa; Caltha caespitosa; Caltha decumbens; Caltha minor arctica; Caltha natans arctica; Caltha natans var. arctica; Caltha palustris arctica; Caltha palustris f. radicans; Caltha palustris flabellifolia; Caltha palustris nivalis; Caltha palustris procumbens; Caltha palustris radicans; Caltha palustris var. arctica; Caltha palustris var. flabellifolia; Caltha palustris var. procumbens; Caltha palustris var. zetlandica; Caltha procumbens; Caltha radicans; Caltha zetlandica