The Collaborative International Dictionary of English v.0.48:

Pease \Pease\ (p[=e]z), n.; obs.pl. Peases, Peasen. [See
   Pea.]
   1. A pea. [Obs.] "A peose." "Bread . . . of beans and of
      peses." --Piers Plowman.
      [1913 Webster]

   2. A plural form of Pea. See the Note under Pea.
      [1913 Webster]