Passion flower

Symbolism

The pointed tips of the leaves were taken to represent the Holy Lance.
The tendrils represent the whips used in the flagellation of Christ.
The ten petals and sepals represent the ten faithful apostles (excluding St. Peter the denier and Judas Iscariot the betrayer).
The flower's radial filaments, which can number more than a hundred and vary from flower to flower, represent the crown of thorns.
The chalice-shaped ovary with its receptacle represents the Holy Grail.
The 3 stigmas represent 3 nails and the 5 anthers below them 5 hammers or 5 wounds (four by the nails and one by the lance).
The blue and white colors of many species' flowers represent Heaven and Purity.

Courtesy of: en.wikipedia.org/wiki/Passiflora