The Collaborative International Dictionary of English v.0.48:

Paigle \Pai"gle\, n. [Etymol. uncertain.] (Bot.)
   A species of Primula, either the cowslip or the primrose.
   [Written also pagle, pagil, peagle, and pygil.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

paigle
    n 1: Eurasian primrose with yellow flowers clustered in a one-
         sided umbel [syn: oxlip, paigle, Primula elatior]
    2: early spring flower common in British isles having fragrant
       yellow or sometimes purple flowers [syn: cowslip, paigle,
       Primula veris]