Lewis & Short

frondesco, dŭi (acc. to Prisc. p. 768 P.), 3, v. inch. n. [frondeo], to become leafy, to put forth leaves, to shoot out.

  1. I. Lit. (class.): caelum nitescere, arbores frondescere, Vites pampinis pubescere, etc., Enn. ap. Cic. Tusc. 1, 28, 69 (Trag. v. 192 ed. Vahl.); Lucr. 1, 1092: alia hieme nudata, verno tempore tepefacta frondescunt, Cic. Tusc. 5, 13, 37: cum subito vidit frondescere Romulus hastam, Ov. M. 15, 561; cf. id. ib. 4, 395: simili frondescit virga metallo, Verg. A. 6, 144.
  2. * II. Trop., of speech, to be flowery: oratio verborum compositione frondescat, Hier. Ep. 36, 14.