hydrolapathum
Could not find hydrolapatho in Logeion dictionaries.
hydrolapatho neuter dative singular, neuter ablative singular of hydrolapathum
hydrŏlăpăthum, i, n., = ὑδρολάπαθον,
- water-dock, Rumex aquaticus, Linn.; Plin. 20, 21, 85, § 232.
hўdrŏlăpăthum (-ŏn), ī, n. (ὑδρολάπαθον), sorte de patience [plante] : Plin. 20, 232.