The Collaborative International Dictionary of English v.0.48:

Lentiginose \Len*tig"i*nose`\ (l[e^]n*t[i^]j"[i^]*n[=o]s`), a.
   [See Lentiginous.] (Bot.)
   Bearing numerous dots resembling freckles.
   [1913 Webster]

WordNet (r) 3.0 (2006):

lentiginose
    adj 1: relating to or covered with or resembling freckles [syn:
           freckled, lentiginous, lentiginose]