WordNet (r) 3.0 (2006):

silver thatch
    n 1: small stocky fan palm of southern Florida and Cuba [syn:
         key palm, silvertop palmetto, silver thatch, Thrinax
         microcarpa, Thrinax morrisii, Thrinax keyensis]
    2: small palm of southern Florida and West Indies closely
       resembling the silvertop palmetto [syn: thatch palm,
       thatch tree, silver thatch, broom palm, Thrinax
       parviflora]