The Collaborative International Dictionary of English v.0.48:

Passiflora \Pas"si*flo"ra\, n. [NL., from L. passio passion (fr.
   pati, passus, to suffer) + flos, floris, flower.] (Bot.)
   A genus of plants, including the passion flower. It is the
   type of the order Passiflore[ae], which includes about
   nineteen genera and two hundred and fifty species.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Passiflora
    n 1: type genus of the Passifloraceae [syn: Passiflora, genus
         Passiflora]