Source : Webster's Revised Unabridged Dictionary (1913)

Polypetalous \Pol`y*pet"al*ous\, a. [Poly- + petal.] (Bot.)
   Consisting of, or having, several or many separate petals;
   as, a polypetalous corolla, flower, or plant. --Martyn.

Source : WordNet®

polypetalous
     adj : having a corolla composed of many separated or distinct
           petals