The Collaborative International Dictionary of English v.0.48:

Stipulaceous \Stip`u*la"ceous\, Stipular \Stip"u*lar\, a. [Cf.
   F. stipulac['e], stipulaire. See Stipula.] (Bot.)
   Of or pertaining to stipules; resembling stipules; furnished
   with stipules; growing on stipules, or close to them;
   occupying the position of stipules; as, stipular glands and
   stipular tendrils.
   [1913 Webster]