A couple from the back yard.

[flamin lib]

5. The name is from Christian symbolism.

From the University of Dayton:
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The Passion Flower symbolism, as originally perceived, and then augmented, includes:

The spiraled tendrils - the lash of Christ's scourging
The central flower column - the pillar of the Scourging
The 72 radial filaments - the Crown of Thorns
The top 3 stigma - the 3 Nails
The lower 5 anthers - the 5 wounds
The Style - the Sponge used to moisten Christ's Lips with Vinegar
The leaves (some species) - the head of the Centurion's Spear
The red stains - Christ's Blood Drops
The Round Fruit - The World Christ came to save
The Fragrance - The Spices prepared by the Holy Women
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I can't discern a scent.

The leaves can be dried and used for tea to calm the nerves or smoked for the same effect.