Lewis & Short

2. rŭmex, ĭcis, f., sorrel, Plin. 11, 8, 8, § 18; 19, 12, 60, § 184; 20, 21, 85, § 231; Plaut. Ps. 3, 2, 26; Titin. ap. Non. 210, 4 (Com. Rel. p. 134 Rib.); Verg. M. 73.