The Collaborative International Dictionary of English v.0.48:

Trifloral \Tri*flo"ral\, Triflorous \Tri*flo"rous\, a. [Pref.
   tri- + L. flos, floris, flower.] (Bot.)
   Three-flowered; having or bearing three flowers; as, a
   triflorous peduncle.
   [1913 Webster]