The Collaborative International Dictionary of English v.0.48:

Bottony \Bot"ton*y\, Botton'e \Bot"to*n['e]\, a. [F.
   boutonn['e], fr. boutonner to bud, button.] (Her.)
   Having a bud or button, or a kind of trefoil, at the end;
   furnished with knobs or buttons.
   [1913 Webster]

   Cross bottony (Her.), a cross having each arm terminating
      in three rounded lobes, forming a sort of trefoil.
      [1913 Webster]