The Collaborative International Dictionary of English v.0.48:

Leafy \Leaf"y\, a. [Compar. Leafier; superl. Leafiest.]
   1. Full of leaves; abounding in leaves; as, the leafy forest.
      "The leafy month of June." --Coleridge.
      [1913 Webster]

   2. Consisting of leaves. "A leafy bed." --Byron.
      [1913 Webster]

WordNet (r) 3.0 (2006):

leafy
    adj 1: having or covered with leaves; "leafy trees"; "leafy
           vegetables" [ant: leafless]

Moby Thesaurus II by Grady Ward, 1.0:

80 Moby Thesaurus words for "leafy":
   aestival, arborescent, beryl-green, berylline, blue-green,
   bluish-green, bosky, bowery, branched, branching, branchy,
   chartreuse, chloranemic, chlorine, chlorotic, citrine, citrinous,
   emerald, filmy, foliaceous, foliaged, foliate, foliated, foliose,
   glaucescent, glaucous, glaucous-green, grassy, green,
   green as grass, green-blue, greenish, greenish-blue,
   greenish-yellow, greensick, holly, in layers, ivy, ivy-green,
   lamellar, lamellate, lamellated, lamelliform, laminate, laminated,
   laminous, leaflike, leaved, leavy, membranous, olivaceous, olive,
   olive-green, porraceous, ramate, ramified, ramose, ramous, scummy,
   shaded, shady, smaragdine, spathic, spathose, springlike,
   stratified, stratiform, summerlike, summery, three-ply, twiggy,
   two-ply, verdant, verdurous, vernal, vernant, vert, virescent,
   woody, yellowish-green