The Collaborative International Dictionary of English v.0.48:

blewits \blewits\ n.
   1. same as blewit.

   Syn: blewit, Tricholoma personatum.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

blewits
    n 1: edible agaric that is pale lilac when young; has a smooth
         moist cap [syn: blewits, Clitocybe nuda]