Synonyms: Acetosa obtusifolia (homotypic); Lapathum obtusatum; Lapathum obtusifolium (homotypic); Rumex acutus (heterotypic); Rumex agrestis; Rumex crispatulus; Rumex divaricatus (heterotypic); Rumex ecuadoriensis (homotypic); Rumex friesii (heterotypic); Rumex friesii var. discolor; Rumex laevigatus (homotypic); Rumex macropterus (homotypic); Rumex obtusifolius agrestis; Rumex obtusifolius divaricatus; Rumex obtusifolius f. abbreviatus; Rumex obtusifolius f. discolor; Rumex obtusifolius f. grandis; Rumex obtusifolius f. leptanthes; Rumex obtusifolius f. purpureus; Rumex obtusifolius f. seminudus; Rumex obtusifolius f. simplex; Rumex obtusifolius f. subedulentus (homotypic); Rumex obtusifolius f. subulatus; Rumex obtusifolius f. trigranis; Rumex obtusifolius friesii; Rumex obtusifolius subulatus; Rumex obtusifolius var. acutus; Rumex obtusifolius var. agrestis (homotypic); Rumex obtusifolius var. coloratus; Rumex obtusifolius var. concolor; Rumex obtusifolius var. discolor; Rumex obtusifolius var. erythrochroa; Rumex obtusifolius var. friesii; Rumex obtusifolius var. intermedius; Rumex obtusifolius var. macrocarpus; Rumex obtusifolius var. obtusifolius; Rumex obtusifolius var. pseudoagrestis; Rumex obtusifolius var. purpureus; Rumex obtusifolius var. ruber; Rumex obtusifolius var. trigranis; Rumex obtusifolius var. unigranis; Rumex oxylapathum (heterotypic); Rumex patens; Rumex purpureus; Rumex ramondianus; Rumex rugelii; Rumex sanguineus (heterotypic); Rumex sepium (homotypic); Rumex subulatus; Rumex sylvestris (heterotypic); Rumex wallrothii