Lappa, lappæ. Plin. The generall name of all burres.Lappa boaria. Plin. Tenax lappa.Ouid.The sticking burre.
Lewis and Short: Latin dictionary
lappa, ae, f., a bur, Verg. G. 1, 153; Ov. P. 2, 1, 14; Plin. 18, 17, 44, 153; 21, 17, 64, 104 al.—II. Lappa, ae, m., a Roman surname; e. g. Rubrenus Lappa, a tragedian, Juv. 7, 72.