Polygonum, polygoni, pe. cor. Herba quam nos Sanguinariam dicimus, vulgo Centinodia dicitur, Parisijs her ba sancti Innocentis. Plin. The weede running on the ground called Swines grasse or knot grasse.
Lewis and Short: Latin dictionary
pŏlgŏnos or -us, i, f., or pŏl-gŏnon, i (pŏlgŏnĭum, ĭi, Scrib. Comp. 193), n., = polu/gonos or -on, a plant (called in pure Lat. herba sanguinalis or sanguinaria), knotgrass, Plin. 27, 12, 91, 113; 26, 15, 90, 158.