The Collaborative International Dictionary of English v.0.48:

Unguiculate \Un*guic"u*late\, Unguiculated \Un*guic"u*la`ted\,
   a.
   1. Furnished with nails, claws, or hooks; clawed. See the
      Note under Nail, n., 1.
      [1913 Webster]

   2. (Bot.) Furnished with a claw, or a narrow stalklike base,
      as the petals of a carnation.
      [1913 Webster]

WordNet (r) 3.0 (2006):

unguiculated
    adj 1: having or resembling claws or nails; "unguiculate
           animals"; "an unguiculate flower petal" [syn:
           unguiculate, unguiculated] [ant: hoofed, hooved,
           ungulate, ungulated]