I. Act., to make green, cause to grow green: “hastas floribus,” Val. Fl. 6, 136: “vada subnatis viridentur ab herbis,” become green, Ov. Hal. 90.—More freq.,
II. Neutr., in the part. pres. viridans, growing green, green, verdant: “cingit viridanti tempora lauro,” Verg. A. 5, 539: “herbae,” Lucr. 2, 33; 5, 1396: “hedera,” Plin. 8, 32, 50, § 117; cf.: “proximus ut viridante toro consederat herbae,” Verg. A. 5, 388: “gemmae,” Plin. 37, 8, 34, § 113: “color,” Lucr. 5, 785.